{"id":3403,"date":"2020-11-09T10:23:46","date_gmt":"2020-11-09T10:23:46","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=3403"},"modified":"2021-07-08T06:51:13","modified_gmt":"2021-07-08T06:51:13","slug":"expired-tinuvin-770-can-be-used-in-polypropylene","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/tr\/expired-tinuvin-770-can-be-used-in-polypropylene\/","title":{"rendered":"\u00c7al\u0131\u015fma, son kullanma tarihi ge\u00e7mi\u015f ultraviyole stabilizat\u00f6r\u00fcn\u00fcn (Tinuvin 770) polipropilende kullan\u0131labilece\u011fini g\u00f6stermektedir"},"content":{"rendered":"

Polimerlerin y\u00fcksek molek\u00fcler a\u011f\u0131rl\u0131klar\u0131ndan kaynaklanan \u00f6zellikleri ve polimerlerin molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131nda de\u011fi\u015fikli\u011fe neden olan her \u015fey polimer bozunmas\u0131 olarak adland\u0131r\u0131l\u0131r. \u00c7ok say\u0131da fakt\u00f6r aras\u0131nda UV radyasyonu, polimer bozunmas\u0131n\u0131n en \u00f6nemli fakt\u00f6rlerinden biridir. Plastiklerin oksijen ve \u0131\u015f\u0131k kaynakl\u0131 bozunmas\u0131n\u0131 \u00f6nlemek teknik ve ekonomik uygulamalar i\u00e7in \u00e7ok \u00f6nemlidir. Katk\u0131 maddeleri, \u00f6zellikle yap\u0131sal bir malzeme olarak kullan\u0131lan d\u0131\u015f uygulama senaryolar\u0131 i\u00e7in end\u00fcstriyel plastikler i\u00e7in gereklidir ve s\u0131cakl\u0131k ve \u0131\u015f\u0131\u011f\u0131n etkilerine kar\u015f\u0131 plastiklerin polimerik stabilitesini art\u0131rabilir. HALS'lerin yayg\u0131n haz\u0131rlama y\u00f6ntemi 2,2,6,6-tetrametil piperidin veya 1,2,2,6,6 pentametil piperidinden yap\u0131l\u0131r. HALS'ler bir\u00e7ok re\u00e7inede, bu malzemeleri radikal hasar ve oksidatif toksisiteden kaynaklanan foto bozunmaya kar\u015f\u0131 korumak i\u00e7in kullan\u0131labilir.<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Tinuvin 770<\/strong><\/span><\/a> Polimerlerde stabilizasyon i\u00e7in kullan\u0131lan bir \u0131\u015f\u0131k dengeleyicidir. Polimerleri, \u00f6zellikle polipropileni UV \u0131\u015f\u0131nlar\u0131na kar\u015f\u0131 koruyabilir ve polimerlerin hava ve g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131na maruz kalarak mekanik ve fiziksel \u00f6zelliklerini kaybetmelerini \u00f6nleyebilir. Tinuvin 770 HALS'lere aittir ve bir \u0131\u015f\u0131k stabilizat\u00f6r\u00fc olarak PE (polietilen), PP (polipropilen), polikarbonat, poli\u00fcretan, PS (polistiren), PA (poliamidler), poliasetaller ve akrilonitril polimerleri gibi bir\u00e7ok polimerde d\u00fcnya \u00e7ap\u0131nda kullan\u0131lmaktad\u0131r. Tinuvin 770'in kimyasal ad\u0131 bis(2,2,6,6-tetrametil-4-piperidinil) sebacat't\u0131r. Kuru ko\u015fullarda Tinuvin 770, polimerlerin do\u011frudan g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 ve asidik ko\u015fullardan kaynaklanan bozunma ve ayr\u0131\u015fmaya kar\u015f\u0131 diren\u00e7li olmas\u0131 i\u00e7in y\u00fcksek bir stabiliteye ve iyi bir performansa sahiptir.<\/h4>\n\n\n\n
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Bununla birlikte, t\u00fcm \u00fcr\u00fcnler zaman\u0131nda t\u00fcketilemeyebilir ve bu da bir dizi son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770 \u00fcretecektir. Petrokimya end\u00fcstrilerinin ekonomik tasarrufu ve \u00e7evre dostu olmas\u0131 i\u00e7in, son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770'in kullan\u0131m olanaklar\u0131n\u0131n incelenmesine y\u00f6nelik bir ara\u015ft\u0131rma dikkat \u00e7ekmektedir. Polimerler i\u00e7in hala etkili ise, \u00e7evreye d\u00fczinelerce toksik kimyasal madde atan mevcut miad\u0131 dolmu\u015f malzeme kullan\u0131m y\u00f6ntemlerinin yerini alabilir. \u00c7al\u0131\u015fmay\u0131 birlikte okuyal\u0131m.<\/strong><\/h4>\n\n\n\n
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Bu \u00e7al\u0131\u015fmaya kat\u0131lan ara\u015ft\u0131rmac\u0131lar ayn\u0131 fabrikada \u00fcretilen son kullanma tarihi ge\u00e7mi\u015f ve ge\u00e7memi\u015f (standart numune olarak da adland\u0131r\u0131l\u0131r) Tinuvin 770 kullanm\u0131\u015flard\u0131r. \u0130ki numunenin erime noktalar\u0131n\u0131n farkl\u0131 olup olmayaca\u011f\u0131n\u0131 g\u00f6rmek i\u00e7in ba\u015flang\u0131\u00e7ta son kullanma tarihi ge\u00e7mi\u015f ve standart numunelerin DSC'lerini test etmi\u015flerdir. \u015eekil 1 ve 2'deki e\u011friler, \u0131s\u0131tma durumunda a\u011f\u0131rl\u0131k kaybeden numuneleri yans\u0131tan DSC e\u011frileridir. Numunelerin erimesi e\u011fride bir tepe noktas\u0131na neden olacakt\u0131r. \u00dcretici firma taraf\u0131ndan verilen MSDS'de Tinuvin 770'in 81-86 \u00b0C aras\u0131nda bir erime noktas\u0131na sahip oldu\u011fu belirtilmektedir. Ara\u015ft\u0131rmalar, standart numunenin 85,92 \u00b0C'lik bir erime s\u0131cakl\u0131\u011f\u0131na sahip oldu\u011funu ve son kullanma tarihi ge\u00e7mi\u015f numunenin 85,54 \u00b0C'nin alt\u0131nda eridi\u011fini g\u00f6stermektedir. Her ikisi de bu aral\u0131kta ve birbirine \u00e7ok yak\u0131nd\u0131r, bu da iki numunenin benzer termal \u00f6zelliklere sahip oldu\u011funu, yani son kullanma tarihi ge\u00e7mi\u015f numunede erime s\u0131cakl\u0131\u011f\u0131n\u0131n de\u011fi\u015fmesine neden olabilecek herhangi bir bozulma olmad\u0131\u011f\u0131n\u0131 g\u00f6stermektedir.<\/h4>\n\n\n\n
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\u015eekil 1: Standart Tinuvin 770'in DSC e\u011frileri.<\/h4>\n\n\n\n
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\u015eekil 2: Expierd Tinuvin 770'in DSC e\u011frisi.<\/h4>\n\n\n\n

Son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770 ve standart numunenin her ikisinin de FT-IR spektrumlar\u0131 bir k\u0131z\u0131l\u00f6tesi spektrometre ile test edilmi\u015ftir. \u015eekil 3'te standart numune i\u00e7in FT-IR spektrumunu g\u00f6rebiliriz. Hepimizin bildi\u011fi gibi karbonil grubu 1660-1850 cm aral\u0131\u011f\u0131nda IR absorpsiyonuna sahiptir.-1<\/sup>spektrumu 1721 cm'de kar\u015f\u0131l\u0131k gelen bir pike sahiptir-1<\/sup> standart numunedeki karbonlu grubun varl\u0131\u011f\u0131n\u0131 g\u00f6stermektedir. Ve N-H ba\u011f\u0131 s\u0131ras\u0131yla 3300 - 3500 cm'de bulunan bir gerilme absorpsiyonuna, e\u011filme absorpsiyonuna ve tabaka d\u0131\u015f\u0131 e\u011filme absorpsiyonuna sahiptir.-1<\/sup>, 1500 cm-1<\/sup> ve 800 cm-1<\/sup>. N-H ba\u011f\u0131n\u0131n titre\u015fim moduna ait t\u00fcm pikler spektrumda 3323 cm'de g\u00f6zlenmi\u015ftir.-1<\/sup>, 3423 cm-1<\/sup>, 1500 cm-1<\/sup> ve 793 cm-1<\/sup>. Spektrum, metilen grubunun b\u00fck\u00fclme absorpsiyon pikinin (CH3<\/sub>) 1378 cm'de-1<\/sup> ve metil grubunun b\u00fck\u00fclme absorpsiyon piki (CH2<\/sub>) uzun zincirde 739 cm'de-1<\/sup> de ortaya \u00e7\u0131kt\u0131.<\/h4>\n\n\n\n
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\u015eekil 3: Standart Tinuvin 770'in FT-IR spektrumu<\/h4>\n\n\n\n

Tinuvin770 son kullanma tarihi ge\u00e7mi\u015f numunenin analizi ile elde edilen FT-IR spektrumlar\u0131 \u015eekil 4'te g\u00f6sterilmektedir. Son kullanma tarihi ge\u00e7mi\u015f numune ayr\u0131ca FT-IR spektrumunda 1721 cm'de kar\u015f\u0131l\u0131k gelen IR absorpsiyon piklerini g\u00f6stermektedir-1<\/sup> karbonil grubuna. N-H gerilme absorpsiyonuna kar\u015f\u0131l\u0131k gelen pik 3300-3500 cm aral\u0131\u011f\u0131nda iki geni\u015f piktir.-1<\/sup> 3323 cm anlam\u0131na gelir-1<\/sup> ve 3423 cm-1<\/sup> ortaya \u00e7\u0131kt\u0131 ve 1500 cm'de N-H b\u00fck\u00fclme absorpsiyonu-1<\/sup> zay\u0131f bir pik olarak g\u00f6zlenir. N-H tabaka d\u0131\u015f\u0131 b\u00fck\u00fclme absorpsiyonu 800 cm-1<\/sup>, 793 cm anlam\u0131na gelir-1<\/sup> g\u00f6zlenir. Ve metilen grubunun b\u00fck\u00fclme absorpsiyon piki (CH3<\/sub>) 1378 cm'de-1<\/sup> ve metil grubunun b\u00fck\u00fclme absorpsiyon piki (CH2<\/sub>) uzun zincirde 739 cm'de-1<\/sup> ortaya \u00e7\u0131kt\u0131.<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770 numunesi ve standart Tinuvin 770 numunesi i\u00e7in elde edilen FT-IR spektrumlar\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131yla, her iki spektrumun da tek bir bile\u015fikle ilgili oldu\u011fu sonucuna var\u0131lm\u0131\u015ft\u0131r ve bu sonu\u00e7, son kullanma tarihinden kaynaklanan bozulma ve de\u011fi\u015fikliklerin bu numunede ger\u00e7ekle\u015fmedi\u011fi sonucuna var\u0131lm\u0131\u015ft\u0131r. Bununla birlikte, FT-IR spektrumu farkl\u0131 i\u00e7eriklerin miktar\u0131n\u0131 do\u011frulayamaz, bu nedenle analiz i\u00e7in ba\u015fka tan\u0131mlama deneylerine ve nicel y\u00f6ntemlere ihtiyac\u0131m\u0131z vard\u0131r.<\/h4>\n\n\n\n

<\/h2>\n\n\n\n
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\u015eekil 4 Tinuvin770'in deney numunesinin FT-IR spektrumu.<\/h4>\n\n\n\n

UV-VIS spektrofotometresi kullan\u0131larak her iki numune \u00fczerinde UV taramas\u0131 yap\u0131lm\u0131\u015f ve iki numunenin absorpsiyon aral\u0131\u011f\u0131n\u0131n birbirine uyup uymad\u0131\u011f\u0131 belirlenmi\u015ftir. Ara\u015ft\u0131rmac\u0131lar standart numunenin ve son kullanma tarihi ge\u00e7mi\u015f numunenin UV-VIS (g\u00f6r\u00fcn\u00fcr - ultraviyole) spektrumlar\u0131n\u0131 test etmi\u015f ve hemen kar\u015f\u0131la\u015ft\u0131rm\u0131\u015flard\u0131r. UV-VIS spektrumu, dalga boyuna (nm) kar\u015f\u0131 absorbans \u015feklinde kaydedilir. \u00c7\u00f6z\u00fcc\u00fc olarak metanol kullan\u0131lan deneyler nedeniyle 800 nm ila 200 nm aras\u0131nda ultraviyole absorbans mevcut de\u011fildir. Test dalga boyu aral\u0131\u011f\u0131 \u015fu ana kadar 205 nm'ye kadard\u0131r ve bu da absorpsiyon kesme noktas\u0131 olarak adland\u0131r\u0131l\u0131r. Bu nedenle, kullan\u0131lan numunenin UV absorpsiyonu, elde edilen spektrumda g\u00f6zlenen pikler ile ilgilidir. Standart numunenin UV spektrumlar\u0131 \u015eekil 5'te g\u00f6sterilmi\u015ftir. Tinuvin 770 yap\u0131s\u0131nda Karbonil kromofor gruplar\u0131 (C=O) bulunmaktad\u0131r. Oksijen ve azot gibi atomlar i\u00e7eren doymam\u0131\u015f bile\u015fiklerde bulunan karbonil gruplar\u0131 n <\/em>\u2192 \u03c0<\/em>280-290 nm aral\u0131\u011f\u0131nda \u2217 tipindedir, \u00e7\u00fcnk\u00fc bu ge\u00e7i\u015flerin \u00e7o\u011fu yasak ge\u00e7i\u015flerdir, bu da pik yo\u011funlu\u011funun azalmas\u0131na neden olur. Tinuvin 770'in standart numunesi 280-290 nm b\u00f6lgesinde zay\u0131f absorpsiyon g\u00f6sterir ve adsorpsiyonu 270 nm'de artmaya ba\u015flar ve 250 nm'de maksimuma ula\u015f\u0131r. Tinuvin 770'in s\u00fcresi dolmu\u015f numunesinin UV spektrumu \u015eekil 6'da g\u00f6sterilmi\u015ftir.<\/h4>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Standart numune gibi son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770 numunesinin Karbonil kromofor grubunun (C=O) 280 - 290 nm alanlar\u0131ndaki kar\u015f\u0131l\u0131k gelen piki zay\u0131ft\u0131 ve 270 nm'den itibaren artmaya ba\u015flad\u0131. Zirve piki 250 nm'de yer almaktad\u0131r. Sonu\u00e7 olarak, son kullanma tarihi ge\u00e7mi\u015f numunede kromofor de\u011fi\u015fikli\u011fi olmam\u0131\u015ft\u0131r, ba\u015fka bir deyi\u015fle, bu iki numune ayn\u0131 absorpsiyona sahiptir ve ayn\u0131 ana bile\u015fenlere sahiptir.<\/h4>\n\n\n\n
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\u015eekil 5 Standart Tinuvin770'in UV-VIS kromatogram\u0131.<\/h4>\n\n\n\n

<\/h2>\n\n\n\n
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\u015eekil 6 Son kullanma tarihi ge\u00e7mi\u015f Tinuvin770'in UV-VIS kromatogram\u0131.<\/h4>\n\n\n\n

Daha sonra ara\u015ft\u0131rmac\u0131lar standart numuneyi ve son kullanma tarihi ge\u00e7mi\u015f numuneyi asetonitril i\u00e7inde \u00e7\u00f6zm\u00fc\u015f ve analiz i\u00e7in HPLC-UV cihaz\u0131na y\u00f6nlendirilen 200 ppm'lik \u00e7\u00f6zeltiler olu\u015fturmu\u015ftur. Kromatograma g\u00f6re al\u0131konma s\u00fcresi 5,4 dakikaya e\u015fittir, bu da enjeksiyondan zirve zirvesine ula\u015fana kadar ge\u00e7en s\u00fcredir. Malzeme piklerinin tan\u0131mlanmas\u0131 i\u00e7in al\u0131konma s\u00fcresi \u00f6nemli bir parametredir. Ve HPLC-UV, her pikin alt\u0131ndaki alan\u0131 sayarak tan\u0131mlamalar\u0131n kantitatif olarak hesaplanmas\u0131 i\u00e7in kullan\u0131labilir. Absorpsiyon bantlar\u0131 olarak da adland\u0131r\u0131lan her bir pikin alt\u0131nda stabilite sistemlerinin entegrat\u00f6rleri taraf\u0131ndan belirlenen alan, \u00e7al\u0131\u015f\u0131lan sistemdeki bile\u015fen miktar\u0131 ile orant\u0131l\u0131d\u0131r. Hem standart numunenin hem de son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770'in al\u0131konma s\u00fcreleri 5,4 dakikad\u0131r, bu da son kullanma tarihi ge\u00e7mi\u015f numunede herhangi bir bozulma olmad\u0131\u011f\u0131n\u0131 g\u00f6stermektedir. \u015eekil 7'deki e\u011friler, standart numune ve son kullanma tarihi ge\u00e7mi\u015f numunenin ger\u00e7ekle\u015ftirilen d\u00f6rt enjeksiyonunda elde edilen pik alan\u0131 miktarlar\u0131d\u0131r. \u0130ki e\u011fri aras\u0131nda k\u00fc\u00e7\u00fck bir fark vard\u0131r, bunun nedeni nem de\u011fi\u015fikli\u011fi veya \u00e7ok say\u0131da numune olabilir. \u0130ki numunenin al\u0131konma s\u00fcreleri birbirine \u00e7ok yak\u0131nd\u0131r ve bu da s\u00fcresi dolan numunenin hala ayr\u0131\u015fmam\u0131\u015f oldu\u011funun kan\u0131t\u0131d\u0131r.<\/h4>\n\n\n\n
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\u015eekil 7: HPLC-UV'de her iki numunenin e\u011fri alt\u0131nda kalan alanlar\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/h4>\n\n\n\n

Ara\u015ft\u0131rmac\u0131lar ayr\u0131ca farkl\u0131 bile\u015fenleri ay\u0131rabilen ve farkl\u0131 bile\u015fenleri tan\u0131mlayabilen iki \u00f6rne\u011fin GC-MS (k\u00fctle spektrometresi ile birle\u015ftirilmi\u015f gaz kromatografisi) spektrumunu test ediyor. \u00d6rnekler s\u0131v\u0131 fazda \u00e7\u00f6z\u00fclecek ve gaz faz\u0131 olmas\u0131 i\u00e7in buharla\u015ft\u0131rma odas\u0131na az miktarda eklenecektir. Gaz kromatografisi, gaz faz\u0131ndaki farkl\u0131 i\u00e7erikleri ay\u0131rmak i\u00e7in inert kat\u0131 y\u00fczey \u00fczerine adsorbe edilen s\u0131v\u0131 sabit fazl\u0131 sabit bir k\u0131lcal kolon kullan\u0131r. Ve k\u00fctle spektrometresi bu farkl\u0131 i\u00e7erikleri tan\u0131mlamak i\u00e7in test edecektir. HPLC-UV kromatogram\u0131 gibi, GC-MS kromatogram\u0131 da farkl\u0131 pikler alt\u0131ndaki alan\u0131 sayarak \u00e7al\u0131\u015f\u0131lan bile\u015fiklerin konsantrasyonunu elde edebilir ve al\u0131konma s\u00fcresini kar\u015f\u0131la\u015ft\u0131rarak bile\u015fimi belirleyebilir. Son kullanma tarihi ge\u00e7mi\u015f numune ile Tinuvin 770'in standart numunesinin al\u0131konma s\u00fcreleri aras\u0131ndaki fark 0,1 dakikadan azd\u0131r ve bu da cihaz hatas\u0131ndan kaynaklan\u0131yor olabilir. Bu HPLC-UV sonucu ile tutarl\u0131d\u0131r. GC-MS sonu\u00e7lar\u0131n\u0131n verileri \u015eekil 8'de kar\u015f\u0131la\u015ft\u0131r\u0131lm\u0131\u015ft\u0131r.<\/h4>\n\n\n\n
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\u015eekil 8: Tinuvin 770 piki alt\u0131ndaki GC-MS alanlar\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/h4>\n\n\n\n

\u00c7al\u0131\u015fmalar, \u0131\u015f\u0131k stabilizat\u00f6r\u00fc Tinuvin770'in son kullanma tarihinden sonra, uygun ko\u015fullar alt\u0131nda, nemden, iyonla\u015ft\u0131r\u0131c\u0131 radyasyonlardan ve y\u00fcksek s\u0131cakl\u0131ktan (ekstr\u00fcder sistem s\u0131cakl\u0131\u011f\u0131n\u0131n \u00fczerinde) uzakta ve alkali bile\u015fik olmas\u0131 nedeniyle serbest asidik ortamda tutulmas\u0131 gerekti\u011fi sonucuna varm\u0131\u015ft\u0131r. Bu ko\u015fullar sa\u011fland\u0131ktan sonra, son kullanma tarihi ge\u00e7mi\u015f Tinuvin 770 yap\u0131s\u0131n\u0131 ve fonksiyonel \u00f6zelliklerini koruyabilir, bu nedenle PP ve di\u011fer polimerlerde stabilizasyon i\u00e7in hala kullan\u0131labilir.<\/h4>\n\n\n\n
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Ayn\u0131 seri \u00fcr\u00fcnler<\/strong><\/h2>\n\n\n\n
HALS 119 \/ I\u015eIK DENGELEYICI 119 \/ CHIMASSORB 119<\/a><\/td>106990-43-6<\/td><\/tr>
HALS 123 \/ I\u015eIK DENGELEYICI 123 \/ TINUVIN 123<\/a><\/td>129757-67-1<\/td><\/tr>
HALS 622 \/ I\u015eIK DENGELEYICI 622 \/ TINUVIN 622<\/a><\/td>65447-77-0<\/td><\/tr>
HALS 770 \/ I\u015eIK DENGELEYICI 770 \/ TINUVIN 770<\/a><\/td>52829-07-9<\/td><\/tr>
HALS 783 \/ UV I\u015eIK DENGELEYICI 783 \/ TINUVIN 783<\/a><\/td> <\/td><\/tr>
HALS 791 \/ I\u015eIK DENGELEYICI 791 \/ TINUVIN 791<\/a><\/td> <\/td><\/tr>
HALS 944 I\u015eIK DENGELEYICI-944 CHIMASORB 944<\/a><\/td>70624-18-9 \/ 71878-19-8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u015eimdi Bize Ula\u015f\u0131n!<\/strong><\/h2>\n\n\n\n

COA, MSDS veya TDS'ye ihtiyac\u0131n\u0131z varsa, l\u00fctfen a\u015fa\u011f\u0131daki forma ileti\u015fim bilgilerinizi girin, genellikle 24 saat i\u00e7inde sizinle ileti\u015fime ge\u00e7ece\u011fiz.<\/strong> Bana e-posta da g\u00f6nderebilirsiniz info@longchangchemical.com<\/a> \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.<\/h4>\n\n\n\n

Bu makale Longchang Kimya Ar-Ge Departman\u0131 taraf\u0131ndan yaz\u0131lm\u0131\u015ft\u0131r. Kopyalaman\u0131z ve yeniden basman\u0131z gerekiyorsa, l\u00fctfen kayna\u011f\u0131 belirtin<\/h4>","protected":false},"excerpt":{"rendered":"

Polimerlerin y\u00fcksek molek\u00fcler a\u011f\u0131rl\u0131klar\u0131ndan kaynaklanan \u00f6zellikleri ve polimerlerin molek\u00fcler a\u011f\u0131rl\u0131\u011f\u0131nda de\u011fi\u015fikli\u011fe neden olan her \u015fey polimer bozunmas\u0131 olarak adland\u0131r\u0131l\u0131r. \u00c7ok say\u0131da fakt\u00f6r aras\u0131nda UV radyasyonu, polimer bozunmas\u0131n\u0131n en \u00f6nemli fakt\u00f6rlerinden biridir. Plastiklerin bozunmas\u0131n\u0131 \u00f6nlemek teknik ve ekonomik uygulamalar i\u00e7in \u00e7ok \u00f6nemlidir [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-3403","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nStudy shows that expired ultraviolet stabilizer (Tinuvin 770) can be used in polypropylene - Longchang Chemical<\/title>\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\/expired-tinuvin-770-can-be-used-in-polypropylene\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Study shows that expired ultraviolet stabilizer (Tinuvin 770) can be used in polypropylene - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Properties of polymers due to their high molecular weight, and anything causing a change in the molecular weight of the polymers are called polymer degradation. 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