{"id":4976,"date":"2022-01-13T06:41:14","date_gmt":"2022-01-13T06:41:14","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=4976"},"modified":"2026-04-28T10:41:54","modified_gmt":"2026-04-28T10:41:54","slug":"why-use-a-composite-photoinitiator-in-light-curing-formulating","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/tr\/why-use-a-composite-photoinitiator-in-light-curing-formulating\/","title":{"rendered":"I\u015f\u0131kla k\u00fcrlenen form\u00fclasyonda neden kompozit bir fotoba\u015flat\u0131c\u0131 kullan\u0131lmal\u0131d\u0131r?"},"content":{"rendered":"

I\u015f\u0131kla k\u00fcrlenen form\u00fclasyonda neden kompozit bir fotoba\u015flat\u0131c\u0131 kullan\u0131lmal\u0131d\u0131r?<\/strong><\/h1>\n\n\n

H\u0131zl\u0131 cevap:<\/strong> \u00c7o\u011fu UV sisteminde, foto ba\u015f la t\u0131c \u0131 lar dalga boyu uyumu, tam k\u00fcrlenme, renk kontrol\u00fc ve hat h\u0131z\u0131 aras\u0131ndaki denge ile se\u00e7ilir. Al\u0131c\u0131lar genellikle tek bir izole \u00fcr\u00fcn yerine harmanlanm\u0131\u015f bir paketi kar\u015f\u0131la\u015ft\u0131r\u0131r.<\/p>\n\n\n\n\n

Fotoba\u015flat\u0131c\u0131lar, fotok\u00fcrlenebilir form\u00fclasyonlar\u0131n \u00e7ok \u00f6nemli bir bile\u015fenidir ve serbest radikallerin kayna\u011f\u0131d\u0131r. Bununla birlikte, fotoba\u015flat\u0131c\u0131lar\u0131n a\u015f\u0131r\u0131 kullan\u0131m\u0131, daha fazla g\u00f6\u00e7 eden madde, hava ko\u015fullar\u0131na kar\u015f\u0131 direncin azalmas\u0131, kaplama filminin yetersiz k\u00fcr kal\u0131nl\u0131\u011f\u0131 ve artan maliyet gibi bir\u00e7ok sorunu beraberinde getirecektir.<\/p>\r\n\r\n\r\n\r\n

Deneyler, fotok\u00fcr form\u00fclasyonlar\u0131nda kompozit fotoba\u015flat\u0131c\u0131lar\u0131n kullan\u0131lmas\u0131n\u0131n yukar\u0131daki sorunlar\u0131n etkili bir \u015fekilde \u00fcstesinden gelebilece\u011fini ve b\u00f6ylece bir\u00e7ok avantaj sa\u011flayabilece\u011fini ortaya koymu\u015ftur. Daha iyi k\u00fcrleme sonu\u00e7lar\u0131n\u0131n elde edilebilmesi \u00f6zellikle \u00f6nemlidir.<\/p>\r\n\r\n\r\n\r\n

Deneylerde yayg\u0131n olarak kullan\u0131lan d\u00f6rt fotoba\u015flat\u0131c\u0131 kullan\u0131lm\u0131\u015ft\u0131r: 184, 1173, TPO ve 819. Kimyasal olarak iki bile\u015fik s\u0131n\u0131f\u0131na aittirler: \u03b1-hidroksi ketonlar ve a\u00e7il fosfin oksitler.<\/p>\r\n\r\n\r\n\r\n

\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
\u0130ngilizce ad\u0131<\/td>\r\n\u00dcr\u00fcn ad\u0131<\/td>\r\nCAS numaras\u0131<\/td>\r\n<\/tr>\r\n
HCPK<\/td>\r\nfotoba\u015flat\u0131c\u0131 184<\/td>\r\n947-19-3<\/td>\r\n<\/tr>\r\n
HMPP<\/td>\r\nfotoba\u015flat\u0131c\u0131 1173<\/span><\/strong><\/td>\r\n7473-98-5<\/td>\r\n<\/tr>\r\n
TPO<\/td>\r\nfotoba\u015flat\u0131c\u0131 TPO<\/strong><\/span><\/td>\r\n75980-60-8<\/td>\r\n<\/tr>\r\n
BAPO<\/td>\r\nfotoba\u015flat\u0131c\u0131 819<\/span><\/strong><\/td>\r\n162881-26-7<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n
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Resim 1<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

Deneyde kullan\u0131lan k\u00fcrleme ekipman\u0131 bir Oriel 100 watt c\u0131va lambas\u0131d\u0131r (emisyon spektrumu Resim 2'de g\u00f6sterilmi\u015ftir) ve film kal\u0131nl\u0131\u011f\u0131 50 \u03bcm'de kontrol edilir.<\/p>\r\n\r\n\r\n\r\n

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Resim 2 Oriel 100W c\u0131va lambas\u0131n\u0131n emisyon spektrumu<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

K\u00fcrlenme derecesi, akrilat doymam\u0131\u015f \u00e7ift ba\u011f\u0131n\u0131n 810cm-1'deki karakteristik absorpsiyon pikinin de\u011fi\u015fimini izlemek i\u00e7in Fourier d\u00f6n\u00fc\u015f\u00fcml\u00fc k\u0131z\u0131l\u00f6tesi spektroskopisi (FTIR) ile tespit edilmi\u015ftir. 750-780cm-1 band\u0131 da referans pik olarak kullan\u0131lm\u0131\u015ft\u0131r \u00e7\u00fcnk\u00fc t\u00fcm fotok\u00fcrleme i\u015flemi boyunca de\u011fi\u015fmemektedir.<\/p>\r\n\r\n\r\n\r\n

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\u00c7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131n\u0131 (Reaksiyona Girmi\u015f Akrilat Doymam\u0131\u015fl\u0131\u011f\u0131, RAU) hesaplamak i\u00e7in form\u00fcl \u015f\u00f6yledir:<\/p>\r\n\r\n\r\n\r\n

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Nerede RL<\/sub><\/em> akrilat \u00e7ift ba\u011f absorpsiyon pikinin s\u0131v\u0131 haldeki referans pike oran\u0131d\u0131r; ve RC<\/sub><\/em> UV k\u00fcrlemeden sonra akrilat \u00e7ift ba\u011f absorpsiyon pikinin referans pike oran\u0131d\u0131r.<\/p>\r\n\r\n\r\n\r\n

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Resim 3 HCPK'n\u0131n (fotoba\u015flat\u0131c\u0131 184) absorpsiyon spektrumu<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n
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Resim 4 HMPP'nin (fotoba\u015flat\u0131c\u0131 1173) absorpsiyon spektrumu<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n
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Resim 5 TPO'nun absorpsiyon spektrumu<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n
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Resim 6 BAPO'nun (fotoba\u015flat\u0131c\u0131 819) absorpsiyon spektrumu<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

HCPK'n\u0131n (fotoba\u015flat\u0131c\u0131 184) ana absorpsiyonu 240-250 nm dalga boyu aral\u0131\u011f\u0131ndad\u0131r ve absorpsiyon piki 320-335 nm aral\u0131\u011f\u0131ndad\u0131r. Ba\u015fka bir hidroksiketon fotoba\u015flat\u0131c\u0131 olan HMPP (Darocur 1173), 320-335 nm aral\u0131\u011f\u0131nda benzer bir absorpsiyona sahiptir ve 265-280 nm'de bir tepe noktas\u0131 vard\u0131r. Sadece bu iki fotoba\u015flat\u0131c\u0131n\u0131n bir kombinasyonunu kullanarak, UV lambas\u0131n\u0131n \u00e7\u0131k\u0131\u015f\u0131ndan daha iyi yararlanmaya ba\u015flamak zaten m\u00fcmk\u00fcnd\u00fcr (\u015eekil 2).<\/p>\r\n\r\n\r\n\r\n

TPO ve BAPO (fotoba\u015flat\u0131c\u0131 819) spektrumlar\u0131 \u00f6nceki ikisinden \u00f6nemli \u00f6l\u00e7\u00fcde farkl\u0131d\u0131r, fotoba\u015flat\u0131c\u0131 TPO 360-395 nm aral\u0131\u011f\u0131nda g\u00fc\u00e7l\u00fc bir absorpsiyona sahiptir ve BAPO 360-410 nm aral\u0131\u011f\u0131nda daha g\u00fc\u00e7l\u00fc bir absorpsiyona sahiptir. Son iki fotoba\u015flat\u0131c\u0131n\u0131n eklenmesi, c\u0131va lambas\u0131n\u0131n 370 ve 408 nm'deki di\u011fer iki ana dalga boyu band\u0131n\u0131 daha iyi kullanabilir.<\/p>\r\n\r\n\r\n\r\n

\u0130lk deneyde, kar\u015f\u0131la\u015ft\u0131rma i\u00e7in ayn\u0131 miktarda (a\u011f\u0131rl\u0131k oran\u0131) 184 ve kompozit fotoba\u015flat\u0131c\u0131 kullan\u0131lm\u0131\u015ft\u0131r. Ayn\u0131 enerjiye sahip 4,5 mJ\/cm2 UV \u0131\u015f\u0131\u011f\u0131n\u0131n \u0131\u015f\u0131nlanmas\u0131 alt\u0131nda, 184 kullan\u0131lan form\u00fcl\u00fcn \u00e7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131 24,8% iken, kompozit fotoba\u015flat\u0131c\u0131 form\u00fcl\u00fcn\u00fcnki 79,6% kadar y\u00fcksektir.<\/p>\r\n\r\n\r\n\r\n

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4% HCPK (fotoba\u015flat\u0131c\u0131 184) ve kompozit fotoba\u015flat\u0131c\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

\u0130kinci deney, 4,5 mJ\/cm2 \u0131\u015f\u0131nlama enerjisi alt\u0131nda 6% 184 ve kompozit fotoba\u015flat\u0131c\u0131 kullanmakt\u0131r, ilkinin \u00e7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131 18,9% iken ikincisinin 67,2% kadar y\u00fcksektir. Aradaki fark \u00e7ok \u00f6nemlidir.<\/p>\r\n\r\n\r\n\r\n

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6% HCPK (foto ba\u015flat\u0131c\u0131184) ve kompozit foto ba\u015flat\u0131c\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

\u00dc\u00e7\u00fcnc\u00fc deneyde s\u0131ras\u0131yla 4% 184 ve 3% kompozit fotoba\u015flat\u0131c\u0131 kullan\u0131lm\u0131\u015ft\u0131r; bu da kompozit fotoba\u015flat\u0131c\u0131 kullan\u0131lan ikinci form\u00fclasyonda daha d\u00fc\u015f\u00fck miktarda fotoba\u015flat\u0131c\u0131 kullan\u0131ld\u0131\u011f\u0131 anlam\u0131na gelmektedir. Ayn\u0131 \u0131\u015f\u0131nlama enerjisi (4,5 mJ\/cm2) alt\u0131nda, ilkinin \u00e7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131 50,9% iken ikincisininki 66,8% olup daha y\u00fcksektir.<\/p>\r\n\r\n\r\n\r\n

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4% HCPK (fotoba\u015flat\u0131c\u0131 184) ve 3% kompozit fotoba\u015flat\u0131c\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

D\u00f6rd\u00fcnc\u00fc deneyde s\u0131ras\u0131yla 6% 184 ve 4.5% kompozit fotoba\u015flat\u0131c\u0131 kullan\u0131lm\u0131\u015ft\u0131r. Radyasyon enerjisi ayn\u0131 kald\u0131\u011f\u0131nda (4,5 mJ\/cm2), ilkinin \u00e7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131 58,3% ve ikincisininki 67,9%'dir. \u00dc\u00e7\u00fcnc\u00fc ve d\u00f6rd\u00fcnc\u00fc deneyler, \u00e7ift ba\u011f d\u00f6n\u00fc\u015f\u00fcm oran\u0131n\u0131n kompozit fotoba\u015flat\u0131c\u0131 form\u00fclasyonu i\u00e7in daha az miktarda olsa bile daha y\u00fcksek olabilece\u011fini g\u00f6stermektedir.<\/p>\r\n\r\n\r\n\r\n

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6% HCPK (fotoba\u015flat\u0131c\u0131 184) ve 4.5% kompozit fotoba\u015flat\u0131c\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n

Deneysel sonu\u00e7lar, kompozit fotoba\u015flat\u0131c\u0131lar\u0131n kullan\u0131m\u0131n\u0131n fotoba\u015flat\u0131c\u0131lar\u0131n ba\u015flatma verimlili\u011fini b\u00fcy\u00fck \u00f6l\u00e7\u00fcde art\u0131rabilece\u011fini g\u00f6stermektedir. Yukar\u0131daki deneylerde referans nesne olarak yaln\u0131zca bir fotoba\u015flat\u0131c\u0131 (fotoba\u015flat\u0131c\u0131 184) kar\u015f\u0131la\u015ft\u0131r\u0131lm\u0131\u015f ve \u0131\u015f\u0131nlama ekipman\u0131 yaln\u0131zca bir c\u0131va lambas\u0131 ile ger\u00e7ekle\u015ftirilmi\u015f olsa da, sonu\u00e7lar kompozit fotoba\u015flat\u0131c\u0131lar\u0131n avantajlar\u0131n\u0131 yeterince g\u00f6sterebilmektedir.<\/p>\r\n\r\n\r\n\r\n

Form\u00fclde fotoba\u015flat\u0131c\u0131 kullan\u0131m\u0131n\u0131n daha iyi olmad\u0131\u011f\u0131n\u0131 biliyoruz, \u00e7\u00fcnk\u00fc \u00e7ok fazla fotoba\u015flat\u0131c\u0131 ultraviyole \u0131\u015f\u0131\u011f\u0131 emecek, bu da derin k\u00fcrleme s\u0131ras\u0131nda ultraviyole \u0131\u015f\u0131\u011f\u0131n penetrasyon verimlili\u011fini b\u00fcy\u00fck \u00f6l\u00e7\u00fcde etkileyecek ve b\u00f6ylece k\u00fcrleme derinli\u011fini etkileyecektir.<\/p>\r\n\r\n\r\n\r\n

Bu kompozit fotoba\u015flat\u0131c\u0131n\u0131n kullan\u0131m\u0131 sadece form\u00fclasyonlar\u0131n maliyetini d\u00fc\u015f\u00fcrmekle kalmaz, ayn\u0131 zamanda daha iyi derin k\u00fcrlenme sa\u011flar, fotoba\u015flat\u0131c\u0131 kal\u0131nt\u0131lar\u0131n\u0131 azalt\u0131r ve maliyetleri d\u00fc\u015f\u00fcr\u00fcr.<\/p>\r\n

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Foto ba\u015flat\u0131c\u0131 ile ilgili projeler i\u00e7in pratik bir se\u00e7im rotas\u0131<\/h2>\n

Teknik al\u0131c\u0131lar veya form\u00fclat\u00f6rler foto ba\u015flatanlar\u0131 incelerken, en kullan\u0131\u015fl\u0131 karar \u00e7er\u00e7evesi genellikle k\u00fcr kalitesi art\u0131 uygulama uygunlu\u011fudur: hangi paket g\u00fcvenilir bir \u015fekilde k\u00fcrlenir, g\u00f6r\u00fcn\u00fcm\u00fc kabul edilebilir tutar ve yine de ger\u00e7ek s\u00fcrecin lamba, film kal\u0131nl\u0131\u011f\u0131 ve alt tabaka ko\u015fullar\u0131 alt\u0131nda \u00e7al\u0131\u015f\u0131r.<\/p>\n