{"id":6778,"date":"2024-03-29T03:17:26","date_gmt":"2024-03-29T03:17:26","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6778"},"modified":"2026-04-28T10:42:26","modified_gmt":"2026-04-28T10:42:26","slug":"6778-2","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/tr\/6778-2\/","title":{"rendered":"Farkl\u0131 antioksidanlar ve proses dozajlar\u0131 PC plastiklerinin renk de\u011fi\u015fimini ne kadar etkiler?"},"content":{"rendered":"<p>Oksidasyonun ba\u015flang\u0131\u00e7 a\u015famas\u0131nda, s\u0131cakl\u0131k artt\u0131k\u00e7a termal bozunma reaksiyonu yo\u011funla\u015facakt\u0131r, PC malzemelerinin oksidatif bozunma reaksiyonu otokatalitik bir s\u00fcre\u00e7tir, polimerdeki karbonil ve hidroksil gruplar\u0131 kom\u015fu kimyasal ba\u011flar\u0131 etkileyerek serbest radikallere b\u00f6l\u00fcnmelerine neden olabilir, ve bu serbest radikaller yeni serbest radikaller olu\u015fturmak i\u00e7in oksijenle reaksiyona girebilir ve b\u00f6ylece, hafta hafta, serbest radikal zincir seyrine g\u00f6re oksidatif reaksiyonun tekrar tekrar d\u00f6ng\u00fcs\u00fc ger\u00e7ekle\u015ftirilmi\u015ftir, polimer zinciri \u00fczerinde peroksitlerin ve di\u011fer oksijen i\u00e7eren gruplar\u0131n olu\u015fumu ile makromolek\u00fcler zinciri k\u0131rmak i\u00e7in ger\u00e7ekle\u015fecektir. Polimer zinciri \u00fczerinde peroksit ve di\u011fer oksijen i\u00e7eren gruplar\u0131n olu\u015fmas\u0131yla, polimer zincirinin k\u0131r\u0131lmas\u0131 meydana gelecek ve zincir sonland\u0131rma a\u015famas\u0131nda, serbest radikallerin kombinasyonu polimerlerin \u00e7apraz ba\u011flanmas\u0131na neden olacak, zincir k\u0131r\u0131lmas\u0131 veya \u00e7apraz ba\u011flanma malzemenin mekanik \u00f6zelliklerinde geri d\u00f6n\u00fc\u015f\u00fc olmayan de\u011fi\u015fikliklere neden olacak ve \u00e7e\u015fitli karbonil bile\u015fiklerinin olu\u015fumu ve birikmesi malzemenin renginin solmas\u0131na neden olarak g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc etkileyecektir.<\/p>\n<p>&nbsp;<\/p>\n<p>Bu nedenle, PC'nin termal stabilitesi, PC'nin termal bozunmadan kaynaklanan renk de\u011fi\u015fimini \u00f6nlemek veya azaltmak i\u00e7in uygun antioksidanlar eklenerek geli\u015ftirilebilir. Bu durumda peroksit ayr\u0131\u015ft\u0131r\u0131c\u0131, zincir sonland\u0131r\u0131c\u0131 antioksidan taraf\u0131ndan sonland\u0131r\u0131lmas\u0131 gereken reaktif serbest radikallerin say\u0131s\u0131n\u0131 azalt\u0131r; zincir sonland\u0131r\u0131c\u0131 antioksidan da ayn\u0131 \u015fekilde peroksit ayr\u0131\u015ft\u0131r\u0131c\u0131n\u0131n y\u00fck\u00fcn\u00fc azalt\u0131r. Engellenmi\u015f fenolik antioksidanda bulunan -OH, oto-oksidasyonda olu\u015fan peroksil radikalleri i\u00e7in polimer ile rekabet eder ve hidrojen atomlar\u0131n\u0131n transferi yoluyla, reaktif radikalleri yakalama ve polimer oksidasyon s\u00fcrecini engelleme yetene\u011fine sahip kararl\u0131 bir antioksidan radikal olu\u015fur. Bu nedenle, antioksidanlar eklenerek PC'nin termal stabilitesi geli\u015ftirilebilir ve b\u00f6ylece PC \u00fcr\u00fcnlerinin rengi iyile\u015ftirilebilir.<\/p>\n<p>&nbsp;<\/p>\n<p>Farkl\u0131 antioksidanlar\u0131n \u00fcr\u00fcn rengi \u00fczerindeki etkisi<\/p>\n<p>Antioksidanlar, PC sentezi s\u0131ras\u0131nda oksidatif bozunma yan reaksiyonlar\u0131n\u0131n olu\u015fmas\u0131n\u0131 azaltmak veya \u00f6nlemek, b\u00f6ylece PC \u00fcr\u00fcn renginin g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc korumak i\u00e7in eklenebilir. PC sentezinde antioksidanlar\u0131n \u00fcr\u00fcn rengi \u00fczerindeki etkisi incelenmi\u015f ve sonu\u00e7lar Tablo 3-1'de listelenmi\u015ftir. Tablo 3-1'den, herhangi bir antioksidan eklenmeden \u00fcretilen PC \u00fcr\u00fcnlerinin sar\u0131 indeksinin ve \u00e7\u00f6zelti renk fark\u0131n\u0131n y\u00fcksek oldu\u011fu g\u00f6r\u00fclebilir. Ana antioksidan 1076, 1010, 2246, BHT, yard\u0131mc\u0131 antioksidan 168, DLTP, DSTP eklendi\u011finde, PC \u00fcr\u00fcnlerinin sar\u0131 indeksini ve \u00e7\u00f6zelti renk fark\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde azaltabilir, bunlardan antioksidan 168, BHT de \u00fcr\u00fcn\u00fcn \u015feffafl\u0131\u011f\u0131n\u0131 art\u0131rabilir, antioksidan 1076, 1010, 2246'n\u0131n temelde antioksidan DLTP'nin \u015feffafl\u0131\u011f\u0131 \u00fczerinde hi\u00e7bir etkisi yoktur, DSTP \u00fcr\u00fcn\u00fcn \u015feffafl\u0131\u011f\u0131n\u0131 biraz azalt\u0131r ve yard\u0131mc\u0131 antioksidan 300 etkisi iyi de\u011fildir, PC \u00fcr\u00fcnlerinin sar\u0131 indeksini ve \u00e7\u00f6zelti renk fark\u0131n\u0131 artt\u0131r\u0131r ve ayr\u0131ca \u00fcr\u00fcn\u00fcn \u015feffafl\u0131\u011f\u0131n\u0131 azalt\u0131r. Yukar\u0131daki antioksidanlar aras\u0131nda sadece 1076 ve 2246, \u00fcr\u00fcnlerin viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde etkilemi\u015ftir ve di\u011fer antioksidanlar\u0131n eklenmesi, \u00fcr\u00fcnlerin viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 \u00fczerinde daha az etkiye sahip olmu\u015ftur. \u00dcr\u00fcn\u00fcn sar\u0131 indeksi, \u015feffafl\u0131\u011f\u0131, \u00e7\u00f6zelti renk fark\u0131 ve MOA kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, ana ve yard\u0131mc\u0131 antioksidanlar\u0131n etkilerinin s\u0131ras\u0131 168\uff1eBHT\uff1e2246\uff1eDSTP\uff1e1076\uff1eDLTP\uff1e1010\uff1e300 \u015feklindedir.<\/p>\n<p>&nbsp;<\/p>\n<p>Antioksidan DSTP ve 1076, DSTP ve 1010, 168 ve 1076, 168 ve 2246'n\u0131n bile\u015fik etkisi daha iyidir, \u00fcr\u00fcn\u00fcn sar\u0131 indeksini ve \u00e7\u00f6zelti renk fark\u0131n\u0131 azaltmak i\u00e7in de\u011fi\u015fen derecelerde olabilir, \u015feffafl\u0131\u011f\u0131n\u0131 art\u0131rabilir; Antioksidan 300 ile 1010, 168 ve 1010'un birle\u015ftirme etkisi \u00e7ok belirgin de\u011fildir, ancak \u00fcr\u00fcn\u00fcn sar\u0131 indeksinde ve \u00e7\u00f6zelti renk farkl\u0131l\u0131\u011f\u0131nda belirli bir dereceye kadar azalma olabilir, ancak Antioksidan 300 ile 1010 ve 168'in 1010 ile birle\u015ftirilmesinin etkisi \u00e7ok belirgin de\u011fildir, ancak sar\u0131 indeksi ve \u00e7\u00f6zelti renk fark\u0131n\u0131 bir dereceye kadar azaltabilir, ancak \u00fcr\u00fcn\u00fcn \u015feffafl\u0131\u011f\u0131n\u0131 azalt\u0131r; antioksidan DLTP ile 1010 ve 168'in BHT ile birle\u015ftirilmesinin etkisi iyi de\u011fildir, bu da \u00fcr\u00fcn\u00fcn sar\u0131 indeksini ve \u00e7\u00f6zelti renk fark\u0131n\u0131 art\u0131r\u0131r ve \u015feffafl\u0131\u011f\u0131n\u0131 azalt\u0131r. Bunlar aras\u0131nda, sadece antioksidan DSTP ve 1076, DSTP ve 1010 bile\u015fik ilavesi, \u00fcr\u00fcn\u00fcn viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 daha b\u00fcy\u00fck bir etkiye sahiptir ve di\u011fer antioksidanlar bile\u015fik ilavesi, \u00fcr\u00fcn\u00fcn viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 daha k\u00fc\u00e7\u00fck bir etkiye sahiptir. \u00dcr\u00fcnlerin sar\u0131 indeksi, \u015feffafl\u0131\u011f\u0131, \u00e7\u00f6zelti renk fark\u0131 ve viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, ana ve yard\u0131mc\u0131 antioksidanlar\u0131n bile\u015fik olu\u015fturma ve ekleme sonras\u0131 etkilerinin \u00fcst\u00fcnl\u00fck ve d\u00fc\u015f\u00fckl\u00fck s\u0131ras\u0131 \u015f\u00f6yledir:<\/p>\n<p>&nbsp;<\/p>\n<p>168+2246\uff1eDSTP+1010\uff1eDSTP+1076\uff1e168+1076\uff1e168+1010\uff1e300+1010\uff1eDLTP+1010\uff1e168+BHT.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6779\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/1-2.png\" alt=\"\" width=\"549\" height=\"668\" \/><\/p>\n<p>Yukar\u0131daki ana antioksidanlar, i\u015flevi serbest radikalleri yakalamak [bkz. form\u00fcl (3-1), form\u00fcl (3-2)] ve kararl\u0131 serbest olmayan radikaller ROO-O-Ar \u00fcretmek olan engellenmi\u015f fenolik antioksidanlara aittir, b\u00f6ylece art\u0131k oksidasyon d\u00f6ng\u00fcs\u00fcne kat\u0131lmazlar. Antioksidan etkinin anahtar\u0131, i\u00e7erdi\u011fi reaktif hidroksil grubunda yatar ve hidroksil grubunun serbest radikallerle reaktivitesi, kom\u015fu R grubunun uzaysal alan direncinden ve kar\u015f\u0131 R grubunun elektronik etkisinden etkilenir. R grubu ne kadar b\u00fcy\u00fckse, alan direnci o kadar b\u00fcy\u00fck ve reaktivite o kadar k\u00fc\u00e7\u00fckt\u00fcr. R grubu elektron veren bir grup oldu\u011funda (\u00f6rn, metil, tersiyer-b\u00fctil), hidroksil grubu \u00fczerindeki hidrojen atomlar\u0131 ve oksijen atomlar\u0131n\u0131n ayr\u0131lmas\u0131n\u0131 h\u0131zland\u0131r\u0131r, bu da hidroksil grubunun serbest radikal kinh ile reaksiyonunun h\u0131z sabitini iyile\u015ftirir, fenolik radikalin pro-elektronik s\u00fcbstit\u00fcsyon grubu sabitini azalt\u0131r, yani n radikal yakalama say\u0131s\u0131n\u0131 artt\u0131r\u0131r, b\u00f6ylece antioksidan aktiviteyi artt\u0131r\u0131r; R grubu elektron \u00e7eken bir grup oldu\u011funda (\u00f6rne\u011fin nitro veya hidroksil), fenolik antioksidan\u0131n antioksidan aktivitesini azalt\u0131r. Yukar\u0131daki fenolik antioksidanlar\u0131n BHT'ye etkisi en iyisidir, \u00e7\u00fcnk\u00fc kom\u015fu R grubundaki molek\u00fcler yap\u0131s\u0131 tert-butildir, uzamsal alan direnci k\u00fc\u00e7\u00fckt\u00fcr, R grubu ayn\u0131 zamanda elektron veren bir grup metildir, antioksidan aktivitesini artt\u0131rm\u0131\u015ft\u0131r.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6780\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/2-1.png\" alt=\"\" width=\"528\" height=\"82\" \/><\/p>\n<p>PC oksidatif radikal zincir reaksiyonu s\u0131ras\u0131nda, hidroperoksitlerin \u00fcretimi ve birikimi, PC materyallerinin bozunmas\u0131nda en kritik ad\u0131md\u0131r ve belirli bir hidroperoksit konsantrasyonu \u00fcretildi\u011finde, radikal dall\u0131 zincirin otoksidasyon sayac\u0131 h\u0131zla ilerler. Bu nedenle, PC sentezi s\u0131ras\u0131nda hidroperoksitleri ayr\u0131\u015ft\u0131rmak i\u00e7in yard\u0131mc\u0131 antioksidanlar eklemek gerekir. Fosfit antioksidan\u0131 168, tiyoester antioksidan\u0131 DLTP ve DSTP, hidroperoksitlerin \u00e7ok etkili ayr\u0131\u015ft\u0131r\u0131c\u0131lar\u0131d\u0131r ve \u00e7ok karars\u0131z makromolek\u00fcl hidroperoksitlerin kararl\u0131 ve inaktif \u00fcr\u00fcnler olu\u015fturmas\u0131n\u0131 ve zincir reaksiyonunu sonland\u0131rmas\u0131n\u0131 sa\u011flayabilir. Bunlar aras\u0131nda fosfit antioksidan 168 en etkili olan\u0131d\u0131r. \u00c7\u00fcnk\u00fc antioksidan 168, hidroperoksitlerin iyi bir \u015fekilde ayr\u0131\u015fmas\u0131na ek olarak, ayn\u0131 zamanda rengi koruma konusunda da iyi bir yetene\u011fe sahiptir. Antioksidan 168'in ana bile\u015feni fosfittir, Arbuzov reaksiyonu yoluyla [bkz. form\u00fcl (3-3), (3-4)] reaksiyon malzemesi sisteminde kalan zararl\u0131 klor\u00fcr iyonlar\u0131n\u0131 yakalayabilir, kararl\u0131 bile\u015fiklerin olu\u015fumu  + CI-, PC makromolek\u00fcllerinin ilk renk de\u011fi\u015fimini \u00f6nler.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6781\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3-1.png\" alt=\"\" width=\"727\" height=\"172\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3-1.png 727w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3-1-600x142.png 600w\" sizes=\"(max-width: 727px) 100vw, 727px\" \/><\/p>\n<p>Ayn\u0131 zamanda, antioksidan 168'in molek\u00fcler form\u00fcl\u00fcndeki fosfor atomu, Fe2+, Mn2+, vb. gibi sistemdeki art\u0131k zararl\u0131 metal iyonlar\u0131yla reaksiyona girebilen iyi bir \u015felatlama ajan\u0131 olan iki yaln\u0131z elektron \u00e7ifti i\u00e7erir. [bkz. form\u00fcl (3-5)] bir \u015felat olu\u015fturmak i\u00e7in, demir i\u00e7ermeyen metal iyonlar\u0131n\u0131n ve PC molek\u00fcl\u00fcndeki fenolik hidroksil grubunun koyu renkli bile\u015fikler olu\u015fturmak \u00fczere reaksiyona girmesini \u00f6nleyerek PC renginin g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc garanti edecek ve \u00fcr\u00fcn\u00fcn \u015feffafl\u0131\u011f\u0131n\u0131 art\u0131racakt\u0131r.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6782\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4-1.png\" alt=\"\" width=\"719\" height=\"71\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4-1.png 719w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4-1-600x59.png 600w\" sizes=\"(max-width: 719px) 100vw, 719px\" \/><\/p>\n<p>Literat\u00fcre g\u00f6re, ana ve yard\u0131mc\u0131 antioksidanlar polimer malzemelere birlikte eklendiklerinde iyi bir antioksidan sinerjistik etki g\u00f6sterebilirler. Antioksidan s\u00fcrecinde, engellenmi\u015f fenolik antioksidan PC oksidasyon radikallerini yakalar ve yard\u0131mc\u0131 antioksidan hidroperoksitleri ayr\u0131\u015ft\u0131r\u0131r ve iki t\u00fcr antioksidan belirli bir bile\u015fik oran\u0131nda eklenir, bu da teorik olarak herhangi bir tek bile\u015fenden daha iyi performansa sahip antioksidan sistemi elde edebilir. Bununla birlikte, antioksidanlar aras\u0131ndaki molek\u00fcler yap\u0131 farkl\u0131l\u0131\u011f\u0131n\u0131n yan\u0131 s\u0131ra reaksiyonun kendi \u00f6zellikleri nedeniyle, fark\u0131n farkl\u0131 ana ve yard\u0131mc\u0131 antioksidan bile\u015fik etkisine neden olur.<\/p>\n<h2><strong>Antioksidan dozaj\u0131n\u0131n PC rengi \u00fczerindeki etkisi<\/strong><\/h2>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> For antioxidant, UV absorber, and HALS topics, formulators usually compare long-term protection, process stability, and color control together because those priorities do not always point to the same additive.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<p>Antioksidanlar, PC sentezleme s\u00fcrecinde termo-oksidatif bozunma reaksiyonunu yava\u015flatabilir, stabilitesini art\u0131rabilir ve PC'nin sararma derecesini azaltabilir. Bu nedenle, antioksidan dozaj\u0131n\u0131n da PC renginin g\u00f6r\u00fcn\u00fcm\u00fc \u00fczerinde belirli bir etkisi vard\u0131r. Farkl\u0131 antioksidan 168 dozajlar\u0131n\u0131n PC rengi \u00fczerindeki etkisi \u015eekil 3-2'de g\u00f6sterilmektedir.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6783\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/5-1.png\" alt=\"\" width=\"573\" height=\"409\" \/><\/p>\n<p>\u015eekil 3-2'den de g\u00f6r\u00fclebilece\u011fi gibi, antioksidan 168 dozaj\u0131n\u0131n PC sar\u0131 indeksi, \u015feffafl\u0131k ve \u00e7\u00f6zelti renk fark\u0131 \u00fczerinde \u00e7ok belirgin bir etkisi vard\u0131r. Antioksidan 168 dozaj\u0131n\u0131n artmas\u0131yla, PC \u00fcr\u00fcnlerinin g\u00f6r\u00fcn\u00fcm kalitesi \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015fmi\u015ftir, dozaj 0,6 wt% oldu\u011funda, PC \u00fcr\u00fcnlerinin g\u00f6r\u00fcn\u00fcm kalitesi daha iyidir, sar\u0131 indeks sadece 1,3%'dir, \u015feffafl\u0131k 99,6%'ye ula\u015f\u0131r, \u00e7\u00f6zelti renk fark\u0131 0,51%'dir. Bu, uygun miktarda antioksidan 168'in PC \u00fcr\u00fcnlerinin y\u00fcksek s\u0131cakl\u0131kta termo-oksidatif bozunmas\u0131n\u0131 etkili bir \u015fekilde \u00f6nleyebilece\u011fini ve y\u00fcksek s\u0131cakl\u0131klarda yan reaksiyonlar\u0131n derecesini azaltabilece\u011fini g\u00f6stermektedir. Antioksidan 168'in dozaj\u0131 az oldu\u011funda, antioksidan etkisi belirgin de\u011fildir ve elde edilen \u00fcr\u00fcn\u00fcn rengi iyi de\u011fildir. Antioksidan 168'in dozaj\u0131 0,6 wt%'yi a\u015ft\u0131ktan sonra, \u00fcr\u00fcn\u00fcn sar\u0131 indeksi artar ve \u015feffafl\u0131k azal\u0131r \u00e7\u00fcnk\u00fc antioksidan 168'in dozaj\u0131 \u00e7ok fazlad\u0131r ve ana bile\u015feni fosfit, bir yan reaksiyonda zay\u0131f alkali kataliz\u00f6rle reaksiyona girer, bu da antioksidan\u0131n antioksidan etkisinin ve kataliz\u00f6r\u00fcn aktivitesinin zay\u0131flamas\u0131na neden olur ve \u00fcr\u00fcn\u00fcn g\u00f6r\u00fcn\u00fcm\u00fc k\u00f6t\u00fc bir renge sahiptir.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6784\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/6-1.png\" alt=\"\" width=\"548\" height=\"347\" \/><\/p>\n<h2><strong>Antioksidan ekleme i\u015fleminin PC rengi \u00fczerindeki etkisi<\/strong><\/h2>\n<p>Eriyik ester de\u011fi\u015fimi y\u00f6ntemiyle haz\u0131rlanan PC'nin reaksiyon \u00f6zellikleri ve antioksidanlar\u0131n farkl\u0131 \u00f6zellikleri nedeniyle, antioksidanlar\u0131n farkl\u0131 ekleme i\u015flemlerinin de PC renginin g\u00f6r\u00fcn\u00fcm\u00fc \u00fczerinde belirli bir etkisi olabilir. Tablo 3-2, s\u0131ras\u0131yla ayn\u0131 dozajda farkl\u0131 antioksidan 168 ekleme i\u015flemlerinin PC rengi \u00fczerindeki etkilerini incelemektedir.<\/p>\n<p>&nbsp;<\/p>\n<p>Tablo 3-2'den, PC sentezi s\u00fcrecinde, birka\u00e7 farkl\u0131 antioksidan ekleme i\u015fleminin PC \u00fcr\u00fcn renginin g\u00f6r\u00fcn\u00fcm\u00fc \u00fczerinde daha b\u00fcy\u00fck bir etkiye sahip oldu\u011fu, PC'nin sar\u0131 indeksinde ve \u00e7\u00f6zelti renk farkl\u0131l\u0131\u011f\u0131nda farkl\u0131 derecelerde azalma oldu\u011fu, \u015feffafl\u0131\u011f\u0131n\u0131 art\u0131rd\u0131\u011f\u0131 ve temelde \u00fcr\u00fcn\u00fcn viskozite ortalama molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131 \u00fczerinde hi\u00e7bir etkisi olmad\u0131\u011f\u0131 g\u00f6r\u00fclebilir. Ekleme i\u015fleminin etkisinin m\u00fckemmelden zay\u0131fa do\u011fru s\u0131ralamas\u0131 \u015fu \u015fekildedir: ester de\u011fi\u015fim reaksiyonundan sonra ekleme \u2265 polikondenzasyon reaksiyonunda ekleme \u2265 ester de\u011fi\u015fim reaksiyonundan \u00f6nce ekleme &gt; polikondenzasyon reaksiyonundan sonra ekleme. Ayr\u0131ca, antioksidan BHT ve antioksidan 2246'n\u0131n farkl\u0131 ekleme i\u015flemlerinin etkileri ayr\u0131 ayr\u0131 ara\u015ft\u0131r\u0131lm\u0131\u015f ve sonu\u00e7lar Tablo 3-3'te g\u00f6sterilmi\u015ftir.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6785\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/7-1.png\" alt=\"\" width=\"559\" height=\"286\" \/><\/p>\n<p>Tablo 3-3'ten, antioksidan BHT ve antioksidan 2246 ekleme i\u015fleminin m\u00fckemmellik s\u0131ras\u0131na etkisi \u015f\u00f6yledir: ekledikten sonra ester de\u011fi\u015fim reaksiyonu &gt; eklemeden \u00f6nce ester de\u011fi\u015fim reaksiyonu ve antioksidan 168 ekleme i\u015fleminde Tablo 3-2 tutarl\u0131l\u0131k s\u0131ras\u0131na g\u00f6re m\u00fckemmellik etkisi, antioksidan\u0131n esas olarak polikondensasyon reaksiyon a\u015famas\u0131nda oldu\u011funu, polimerizasyon a\u015famas\u0131nda, reaksiyon s\u0131cakl\u0131\u011f\u0131 y\u00fcksek oldu\u011funda polikondensasyon a\u015famas\u0131nda rol oynad\u0131\u011f\u0131n\u0131, bu s\u0131rada antioksidan\u0131n eklenmesinin y\u00fcksek s\u0131cakl\u0131kta termal bozunma yan reaksiyonunun meydana gelmesini etkili bir \u015fekilde \u00f6nleyebilece\u011fini g\u00f6sterir. \u015eu anda, antioksidanlar\u0131n eklenmesi, y\u00fcksek s\u0131cakl\u0131klarda termal bozunma yan reaksiyonlar\u0131n\u0131n olu\u015fumunu etkili bir \u015fekilde \u00f6nleyebilir ve iyi bir antioksidan etkisi oynayabilir.<\/p>\n<p>&nbsp;<\/p>\n<h2><strong>Antioksidanlar\u0131n polikarbonat performans\u0131 \u00fczerindeki etkisi<\/strong><\/h2>\n<p>Yukar\u0131daki antioksidan\u0131n deneysel olarak incelenmesiyle, sar\u0131 indeks, \u015feffafl\u0131k, \u00e7\u00f6zelti renk fark\u0131 ve karakteristik viskozite performans indeksi alt\u0131nda, antioksidan 168'in etkisinin en iyi oldu\u011fu sonucuna var\u0131lm\u0131\u015ft\u0131r, \u015eekil 3-3 ve 3-4 s\u0131ras\u0131yla bu antioksidan eklenmeden ve bu antioksidan eklenerek PC \u00fcr\u00fcnlerinin g\u00f6r\u00fcn\u00fcm diyagramlar\u0131d\u0131r.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6786\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/8-1.png\" alt=\"\" width=\"539\" height=\"264\" \/><\/p>\n<p>\u015eekil 3-3 ve 3-4'\u00fcn kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131, antioksidan ilavesinin PC \u00fcr\u00fcn renginin g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirebilece\u011fini g\u00f6stermektedir, ancak antioksidan ilavesinin PC'nin yap\u0131sal \u00f6zellikleri \u00fczerinde belirli bir etkisi olup olmayaca\u011f\u0131 bilinmemektedir, bu nedenle \u00fcr\u00fcn\u00fc karakterize etmek i\u00e7in PC'ye 0,6 wt% antioksidan 168 ilavesi ger\u00e7ekle\u015ftirilmi\u015ftir.<\/p>\n<p>&nbsp;<\/p>\n<p>4.1 K\u0131z\u0131l\u00f6tesi analiz<\/p>\n<p>&nbsp;<\/p>\n<p>K\u0131z\u0131l\u00f6tesi spektrumlar kimyasal yap\u0131 birimleri, u\u00e7 gruplar, katk\u0131 maddeleri ve kristal durumu vb. hakk\u0131nda baz\u0131 bilgiler sa\u011flayabilir. Antioksidan ilavesiz PC ve antioksidan ilaveli PC, \u015eekil 3-5 ve 3-6'da g\u00f6sterildi\u011fi gibi k\u0131z\u0131l\u00f6tesi karakterizasyona tabi tutulmu\u015ftur.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6787\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/9-1.png\" alt=\"\" width=\"425\" height=\"376\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6788\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/10.png\" alt=\"\" width=\"430\" height=\"385\" \/><\/p>\n<p>\u015eekil 3-5 ve 3-6'daki numunelerin k\u0131z\u0131l\u00f6tesi spektrumlar\u0131ndan, iki \u015feklin karakteristik piklerinin temelde ayn\u0131 oldu\u011fu g\u00f6r\u00fclebilir. 1769cm-1 ekilen grubun (C=O) gerilme titre\u015fiminin karakteristik absorpsiyon piki olup, polikarbonat\u0131n (C=O) \u00e7ift ba\u011flanmas\u0131n\u0131 g\u00fc\u00e7lendiren yap\u0131s\u0131 nedeniyle karbonil grubunun ola\u011fan absorpsiyonunun y\u00fcksek frekansl\u0131 taraf\u0131nda yer al\u0131r ve bu nedenle absorpsiyon karbonil grubunun ola\u011fan absorpsiyonunun y\u00fcksek frekansl\u0131 taraf\u0131nda yer al\u0131r. 1219cm-1 ve 1158cm-1 C-O germe titre\u015fim pikleri i\u00e7in g\u00fc\u00e7l\u00fc bir pike sahiptir, bu nedenle numunenin bir ester karbonil grubu i\u00e7erdi\u011fi belirlenebilir. 1503cm-1, benzen halkas\u0131 iskeletinin gerilme titre\u015fiminden kaynaklanan orta yo\u011funlukta karakteristik bir absorpsiyon pikine sahiptir ve bu da numunenin bir benzen halkas\u0131 i\u00e7erdi\u011fini g\u00f6sterir. 2925cm-1, 2968cm-1 ve 3042cm-1 benzen halkas\u0131 \u00fczerindeki C-H ba\u011f\u0131n\u0131n gerilme titre\u015fiminin karakteristik absorpsiyon pikleridir. 1080cm-1, 1014cm-1 ve 828cm-1 benzen halkas\u0131 \u00fczerindeki C-H ba\u011f\u0131n\u0131n gerilme titre\u015fiminin karakteristik absorpsiyon piklerine kar\u015f\u0131l\u0131k gelir, 828cm-1 para-aromatik halkan\u0131n parmak izi piklerine kar\u015f\u0131l\u0131k gelir, bu da temel olarak polikarbonat\u0131n tipik karakteristik spektrumlar\u0131yla tutarl\u0131d\u0131r ve bu nedenle ana zincirinin bir polikarbonat grubu ve bir benzen halkas\u0131 i\u00e7eren do\u011frusal bir yap\u0131 oldu\u011fu, yani numunenin do\u011frusal bir bisfenol A tipi polikarbonat oldu\u011fu belirlenebilir. Ayr\u0131ca antioksidan ilavesinin PC'nin yap\u0131s\u0131nda herhangi bir de\u011fi\u015fikli\u011fe neden olmad\u0131\u011f\u0131n\u0131 g\u00f6stermektedir.<\/p>\n<p>&nbsp;<\/p>\n<p>4.2 Termal kararl\u0131l\u0131k<\/p>\n<p>&nbsp;<\/p>\n<p>PC enjeksiyon kal\u0131plaman\u0131n 240\u00b0C'den daha y\u00fcksek olan nispeten y\u00fcksek s\u0131cakl\u0131\u011f\u0131 nedeniyle, ancak PC 250\u00b0C'nin \u00fczerinde oksijende bozulmaya ba\u015flar. Literat\u00fcrde PC'nin termal stabilitesinin antioksidanlar eklenerek etkili bir \u015fekilde iyile\u015ftirilebilece\u011fi bildirilmi\u015ftir. Antioksidan eklenmemi\u015f ve antioksidan eklenmi\u015f PC \u00fcr\u00fcnleri \u015eekil 3-7 ve 3-8'de g\u00f6sterildi\u011fi gibi termogravimetrik olarak analiz edilmi\u015ftir.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6789\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11-1.png\" alt=\"\" width=\"611\" height=\"558\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11-1.png 611w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11-1-600x548.png 600w\" sizes=\"(max-width: 611px) 100vw, 611px\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6790\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12-1.png\" alt=\"\" width=\"662\" height=\"572\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12-1.png 662w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12-1-600x518.png 600w\" sizes=\"(max-width: 662px) 100vw, 662px\" \/><\/p>\n<p>\u015eekil 3-7 ve 3-8'de g\u00f6sterildi\u011fi gibi, antioksidan eklenmemi\u015f PC \u00fcr\u00fcnlerinin epitaksiyel ba\u015flang\u0131\u00e7 s\u0131cakl\u0131\u011f\u0131 401,33\u00b0C iken, antioksidan eklenmi\u015f PC \u00fcr\u00fcnlerininki 417,97\u00b0C'dir. PC'nin termal bozunma s\u0131cakl\u0131\u011f\u0131 17\u00b0C artm\u0131\u015ft\u0131r, bu da antioksidan ilavesinin PC \u00fcr\u00fcnlerinin termal stabilitesini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilece\u011fini g\u00f6stermektedir.<\/p>\n<p>&nbsp;<\/p>\n<p>4.3 Diferansiyel taramal\u0131 kalorimetrik analiz<\/p>\n<p>&nbsp;<\/p>\n<p>Cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (Tg) re\u00e7inelerin \u00f6l\u00e7\u00fcm\u00fc i\u00e7in \u00f6nemli bir indekstir ve genellikle cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131n\u0131n alt\u0131nda kullan\u0131lan re\u00e7ineler sert plastikler, cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131n\u0131n \u00fczerinde kullan\u0131lan re\u00e7ineler ise kau\u00e7uklar olarak adland\u0131r\u0131l\u0131r. Bu nedenle, cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 polikarbonat so\u011futucular\u0131n daha sonra kal\u0131planmas\u0131 ve i\u015flenmesi i\u00e7in \u00f6nemli bir referans de\u011ferdir. \u015eekil 3-9 ve 3-10 s\u0131ras\u0131yla antioksidan eklenmemi\u015f PC \u00fcr\u00fcnlerinin ve antioksidan eklenmi\u015f PC \u00fcr\u00fcnlerinin DSC e\u011frilerini g\u00f6stermektedir.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6791\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/13-1.png\" alt=\"\" width=\"530\" height=\"508\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6792\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/14.png\" alt=\"\" width=\"528\" height=\"473\" \/><\/p>\n<p>\u015eekil 3-9 ve \u015eekil 3-10'dan g\u00f6r\u00fclebilece\u011fi \u00fczere, her iki durumda da PC \u00fcr\u00fcnlerinin Tg de\u011feri 142\u00b0C olup, bu de\u011fer PC standart \u00fcr\u00fcnlerinin 149\u00b0C olan cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131na benzerdir ve PC'ye antioksidan ilavesinin temelde cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 \u00fczerinde hi\u00e7bir etkisi olmad\u0131\u011f\u0131n\u0131 g\u00f6stermektedir. Ayn\u0131 zamanda 230 \u2103 ~ 270 \u2103 aral\u0131\u011f\u0131nda, iki e\u011fri belirgin erime noktas\u0131 d\u00f6n\u00fcm noktas\u0131n\u0131n iki e\u011frisinde bulunmaz, bu da polikarbonat\u0131n sabit bir erime noktas\u0131na, yani amorf forma sahip olmad\u0131\u011f\u0131n\u0131 g\u00f6sterir.<\/p>\n<h1><strong><b>\u015eimdi Bize Ula\u015f\u0131n!<\/b><\/strong><\/h1>\n<h4><strong><b>Fiyata ihtiyac\u0131n\u0131z varsa, l\u00fctfen a\u015fa\u011f\u0131daki forma ileti\u015fim bilgilerinizi doldurun, genellikle 24 saat i\u00e7inde sizinle ileti\u015fime ge\u00e7ece\u011fiz. Bana e-posta da g\u00f6nderebilirsiniz\u00a0<a href=\"mailto:info@longchangchemical.com\"><span style=\"color: #00ccff;\">info@longchangchemical.com<\/span><\/a>\u00a0\u00c7al\u0131\u015fma saatleri i\u00e7inde (8:30 - 6:00 UTC+8 Pzt.~Sat.) veya h\u0131zl\u0131 yan\u0131t almak i\u00e7in web sitesi canl\u0131 sohbetini kullan\u0131n.<\/b><\/strong><\/h4>\n<p>&nbsp;<\/p>\n<table width=\"981\">\n<tbody>\n<tr>\n<td width=\"499\"><strong>Form\u00fclasyon \u00dcr\u00fcnleri<\/strong><\/td>\n<td width=\"151\"><\/td>\n<td width=\"331\"><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1135-cas-125643-61-0\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1135<\/span><\/a><\/td>\n<td>CAS 125643-61-0<\/td>\n<td>Irganox 1135 \/ Antioksidan 1135<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1425-cas-65140-91-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1425<\/span><\/a><\/td>\n<td>CAS 65140-91-2<\/td>\n<td>Irganox 1425 \/ Dragonox 1425 \/ Antioksidan 1425 \/ BNX 1425<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1726-cas-110675-26-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1726<\/span><\/a><\/td>\n<td>CAS 110675-26-8<\/td>\n<td>Antioksidan 1726 \/ Irganox 1726 \/ Omnistab AN 1726<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-3052-cas-61167-58-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 3052<\/span><\/a><\/td>\n<td>CAS 61167-58-6<\/td>\n<td>IRGANOX 3052 \/ 4-metilfenil Akrilat \/ Antioksidan 3052<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-5057-cas-68411-46-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 5057<\/span><\/a><\/td>\n<td>CAS 68411-46-1<\/td>\n<td>Irganox 5057 \/ Antioksidan 5057 \/ Omnistab AN 5057<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-697-antioxidant-697-cas-70331-94-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 697<\/span><\/a><\/td>\n<td>CAS 70331-94-1<\/td>\n<td>Antioksidan 697 \/ Irganox 697 \/ Naugard XL-1 \/ Antioksidan 697<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-80-cas-90498-90-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 80<\/span><\/a><\/td>\n<td>CAS 90498-90-1<\/td>\n<td>Irganox 80 \/ Antioksidan 80<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1024-cas-32687-78-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1024<\/span><\/a><\/td>\n<td>CAS 32687-78-8<\/td>\n<td>Irganox 1024 \/ Antioksidan 1024<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1035-cas-41484-35-9\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1035<\/span><\/a><\/td>\n<td>CAS 41484-35-9<\/td>\n<td>Irganox 1035 \/ Antioksidan 1035<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaohe-s01-n40\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae HE-S01\/N40<\/span><\/a><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaohn-55-70-80-502-510-514-516-602\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae HN-55\/70\/80\/502\/510\/514\/516\/602<\/span><\/a><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-hc-30-100\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae HC-30\/100<\/span><\/a><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-ho-17-17eh\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae HO-17\/17EH<\/span><\/a><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-hs-502-503-504-603-605-608-101\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae HS-502\/503\/504\/603\/605\/608\/101<\/span><\/a><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>Fosfit antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-168-cas-31570-04-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 168<\/span><\/a><\/td>\n<td>CAS 31570-04-4<\/td>\n<td>Irganox 168 \/ Antioksidan 168<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-626-cas-26741-53-7\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 626<\/span><\/a><\/td>\n<td>CAS 26741-53-7<\/td>\n<td>Ultranox 626 \/ Irgafos 126<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1790-cas-40601-76-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1790<\/span><\/a><\/td>\n<td>CAS 40601-76-1<\/td>\n<td>Antioksidan 1790\/ Cyanox 1790 \/ Irganox 1790<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-245-cas-36443-68-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 245<\/span><\/a><\/td>\n<td>CAS 36443-68-2<\/td>\n<td>Irganox 245 \/ Antioksidan 245<\/td>\n<\/tr>\n<tr>\n<td><strong>Y\u00fcksek Performansl\u0131 Fosfitler<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1500-cas-96152-48-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1500<\/span><\/a><\/td>\n<td>CAS 96152-48-6<\/td>\n<td>Antioksidan 1500<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao4500-cas-13003-12-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 4500<\/span><\/a><\/td>\n<td>CAS 13003-12-8<\/td>\n<td>Antioksidan 4500<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-pdp-cas-80584-86-7\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae PDP<\/span><\/a><\/td>\n<td>CAS 80584-86-7<\/td>\n<td>PowerNox DHOP \/ Antioksidan DHOP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao618-cas-3806-34-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 618<\/span><\/a><\/td>\n<td>CAS 3806-34-6<\/td>\n<td>Antioksidan 618<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaodlp-cas-21302-09-0\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DLP<\/span><\/a><\/td>\n<td>CAS 21302-09-0<\/td>\n<td>Antioksidan DLP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaodpp-cas-4712-55-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DPP<\/span><\/a><\/td>\n<td>CAS 4712-55-4<\/td>\n<td>Antioksidan DPP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaodtdp-cas-36432-46-9\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DTDP<\/span><\/a><\/td>\n<td>CAS 36432-46-9<\/td>\n<td>Antioksidan DTDP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaothop-cas-80584-85-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae THOP<\/span><\/a><\/td>\n<td>CAS 80584-85-6<\/td>\n<td>Antioksidan THOP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-tnpp-cas-26523-78-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TNPP<\/span><\/a><\/td>\n<td>CAS 26523-78-4<\/td>\n<td>Antioksidan TNPP \/ Tris(nonilfenil) fosfit<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-pep-36-cas-80693-00-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae PEP-36<\/span><\/a><\/td>\n<td>CAS 80693-00-1<\/td>\n<td>Antioksidan 636 \/ Antioksidan 636<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-9228-cas-154862-43-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 9228<\/span><\/a><\/td>\n<td>CAS 154862-43-8<\/td>\n<td>Irganox 9228 \/ Antioksidan 9228<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-pepq-cas-119345-01-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae PEPQ<\/span><\/a><\/td>\n<td>CAS 119345-01-6<\/td>\n<td>Hostanox PEPQ \/ Antioksidan PEPQ<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><strong>D\u00fc\u015f\u00fck Safl\u0131kta Fosfitler<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-dpop-cas-15647-08-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DPOP<\/span><\/a><\/td>\n<td>CAS 15647-08-2<\/td>\n<td>2-etilheksil difenil fosfit<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao8621-cas-68123-00-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 8621<\/span><\/a><\/td>\n<td>CAS 68123-00-2<\/td>\n<td>Antioksidan 8621<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaodpdp-cas-26544-23-0\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DPDP<\/span><\/a><\/td>\n<td>CAS 26544-23-0<\/td>\n<td>Antioksidan DPDP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaopddp-cas-25550-98-5\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae PDDP<\/span><\/a><\/td>\n<td>CAS 25550-98-5<\/td>\n<td>Antioksidan PDDP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaopdop-cas-3164-60-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae PDOP<\/span><\/a><\/td>\n<td>CAS 3164-60-1<\/td>\n<td>Antioksidan PDOP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaotpp-cas-101-02-0\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TPP<\/span><\/a><\/td>\n<td>CAS 101-02-0<\/td>\n<td>Antioksidan TPP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/polydicyclopentadiene-co-p-cresol-cas-68610-51-5\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae Poly(dicyclopentadiene-co-p-cresol)<\/span><\/a><\/td>\n<td>CAS 68610-51-5<\/td>\n<td>Poli(disiklopentadien-ko-p-kresol)<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-seed-cas-42774-15-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae SEED<\/span><\/a><\/td>\n<td>CAS 42774-15-2<\/td>\n<td>Antioksidan SEED \/ Omnistab LS 5519 \/ I\u015f\u0131k Sabitleyici 856<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0130nhibe edilmi\u015f fenolik Antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-264-cas-128-37-0\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 264<\/span><\/a><\/td>\n<td>CAS 128-37-0<\/td>\n<td>Antioksidan 264 \/ B\u00fctillenmi\u015f hidroksitoluen<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/26-di-tert-butylphenol-cas-128-39-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 2,6-Di-tert-butilfenol<\/span><\/a><\/td>\n<td>CAS 128-39-2<\/td>\n<td>2,6-Di-tert-butilfenol<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-300-cas-96-69-5\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 300<\/span><\/a><\/td>\n<td>CAS 96-69-5<\/td>\n<td>Irganox 300 \/ Antioksidan 300<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-2246-cas-119-47-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 2246<\/span><\/a><\/td>\n<td>CAS 119-47-1<\/td>\n<td>Irganox 2246 \/ BNX 2246<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/antioxidant-1222-cas-976-56-7\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1222<\/span><\/a><\/td>\n<td>CAS 976-56-7<\/td>\n<td>Antioksidan 1222 \/ Irganox 1222<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-702-cas-118-82-1\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 702<\/span><\/a><\/td>\n<td>CAS 118-82-1<\/td>\n<td>Irganox 702 \/ Antioksidan 702 \/ Ethanox 702<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-dbhq-cas-88-58-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DBHQ<\/span><\/a><\/td>\n<td>CAS 88-58-4<\/td>\n<td>Antioksidan DTBHQ<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-mtbhq-cas-1948-33-0-industrial-grade\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae MTBHQ<\/span><\/a><\/td>\n<td>CAS 1948-33-0<\/td>\n<td>2-tert-butilhidrokinon End\u00fcstriyel S\u0131n\u0131f<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1076-cas-2082-79-3\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1076<\/span><\/a><\/td>\n<td>CAS 2082-79-3<\/td>\n<td>Irganox 1076 \/ Antioksidan 1076<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1010-cas-6683-19-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1010<\/span><\/a><\/td>\n<td>CAS 6683-19-8<\/td>\n<td>Irganox 1010 \/ Antioksidan 1010<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1330-cas-1709-70-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1330<\/span><\/a><\/td>\n<td>CAS 1709-70-2<\/td>\n<td>Irganox 1330 \/ Ethanox 330<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1520-cas-110553-27-0-2\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1520<\/span><\/a><\/td>\n<td>CAS 110553-27-0<\/td>\n<td>Irganox 1520 \/ Antioksidan 1520<\/td>\n<\/tr>\n<tr>\n<td><strong>Fenols\u00fcz Fosfitler Antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-8608-cas-26544-27-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 8608<\/span><\/a><\/td>\n<td>CAS 26544-27-4<\/td>\n<td>Antioksidan AO DPD \/ Everaox 202<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao430-cas-36788-39-3\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 430<\/span><\/a><\/td>\n<td>CAS 36788-39-3<\/td>\n<td>Antioksidan 430 \/ WESTON 430<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao8608t-cas-1334238-11-7-69439-68-5\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 8608T<\/span><\/a><\/td>\n<td>CAS 1334238-11-7, 69439-68-5<\/td>\n<td>Antioksidan 8608T<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao8627-cas-68610-62-8\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 8627<\/span><\/a><\/td>\n<td>CAS 68610-62-8<\/td>\n<td>Antioksidan 8627<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaotdp-cas-25448-25-3\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TDP<\/span><\/a><\/td>\n<td>CAS 25448-25-3<\/td>\n<td>Antioksidan TDP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaotlp-cas-3076-63-9\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TLP<\/span><\/a><\/td>\n<td>CAS 3076-63-9<\/td>\n<td>Antioksidan TLP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaotop-cas-301-13-3\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TOP<\/span><\/a><\/td>\n<td>CAS 301-13-3<\/td>\n<td>Antioksidan TOP<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiaottdp-cas-77745-66-5\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae TTDP<\/span><\/a><\/td>\n<td>CAS 77745-66-5<\/td>\n<td>Antioksidan TTDP<\/td>\n<\/tr>\n<tr>\n<td><strong>Tiyol esterleri Antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-dltdp-cas-123-28-4\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DLTDP<\/span><\/a><\/td>\n<td>CAS 123-28-4<\/td>\n<td>Dilauril tiyodipropiyonat<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-dstdp-cas-693-36-7\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae DSTDP<\/span><\/a><\/td>\n<td>CAS 693-36-7<\/td>\n<td>istearil tiyodipropiyonat\/ Antioksidan DSTDP<\/td>\n<\/tr>\n<tr>\n<td><strong>Aminik Antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-3114-cas-27676-62-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 3114<\/span><\/a><\/td>\n<td>CAS 27676-62-6<\/td>\n<td>Irganox 3114 \/ Antioksidan 3114<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/cas-92-88-6\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 4,4\u2032-bifenol<\/span><\/a><\/td>\n<td>CAS 92-88-6<\/td>\n<td>4,4\u2032-bifenol<\/td>\n<\/tr>\n<tr>\n<td><strong>Metal deaktivat\u00f6rler Antioksidanlar<\/strong><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1098-cas-23128-74-7\/\"><span style=\"color: #00ccff;\">CHLUMIAO\u00ae 1098<\/span><\/a><\/td>\n<td>CAS 23128-74-7<\/td>\n<td>Irganox 1098 \/ Antioksidan 1098<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical selection route for antioxidant, UV absorber, and HALS packages<\/h2>\n<p>Most stabilizer decisions work best when they are treated as package decisions rather than single-product decisions. Technical buyers usually get the strongest answer by reviewing long-term heat aging, process stability, weather exposure, and color sensitivity together.<\/p>\n<ul>\n<li><strong>Separate processing protection from long-term stability:<\/strong> the best additive for melt history is not always the same one that gives the best service-life retention.<\/li>\n<li><strong>Use synergy deliberately:<\/strong> many polymer and coating systems perform best when primary and secondary stabilizers are paired intentionally.<\/li>\n<li><strong>Review color and clarity requirements:<\/strong> clear, pale, food-contact, or white systems often need a tighter package than dark industrial products.<\/li>\n<li><strong>Check the real aging condition:<\/strong> heat, UV, humidity, and outdoor exposure can each change which stabilizer route is commercially strongest.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1010-cas-6683-19-8\/\">CHLUMIAO 1010<\/a>:<\/strong> A widely used primary antioxidant benchmark for long-term thermal stability.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-168-cas-31570-04-4\/\">CHLUMIAO 168<\/a>:<\/strong> A practical process-stability reference when hydroperoxide control matters.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-1076-cas-2082-79-3\/\">CHLUMIAO 1076<\/a>:<\/strong> A familiar phenolic-antioxidant benchmark when balancing efficiency and formulation fit.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/tr\/product\/chlumiao-dltdp-cas-123-28-4\/\">CHLUMIAO DLTDP<\/a>:<\/strong> A useful sulfur-containing stabilizer route when synergistic antioxidant packages are being reviewed.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why are stabilizer packages often stronger than a single additive?<\/strong><br \/>Because different products can protect different parts of the degradation pathway, so the package often covers more risk than one grade alone.<\/p>\n<p><strong>Does adding more antioxidant or UV stabilizer always improve performance?<\/strong><br \/>Not necessarily. Over-dosing can increase cost and sometimes create side effects, so most systems perform best inside a tested dosage window.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>In the beginning stage of oxidation, as the temperature rises it will intensify the thermal degradation reaction, the oxidative degradation reaction of PC materials is an autocatalytic process, the carbonyl<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152],"tags":[],"class_list":["post-6778","post","type-post","status-publish","format-standard","hentry","category-antioxidant"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How much do different antioxidants and process dosages affect discolouration of PC plastics? - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"In the beginning stage of oxidation, as the temperature rises it will intensify the thermal degradation reaction, the oxidative degradation reaction of...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/tr\/6778-2\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How much do different antioxidants and process dosages affect discolouration of PC plastics? 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