End capped polyenic structures as visible light sensitive photoinitiators for polymerization of vinylethers

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• 作者：Haifaa Mokbel^a ; ^c ; Fré ; dé ; ric Dumur^b ; ^d ; Cé ; dric R. Mayer^e ; Fabrice Morlet-Savary^a ; Bernadette Graff^a ; Didier Gigmes^b ; ^{didier.gigmes@univ-amu.fr" class="auth_mail} ; Joumana Toufaily^c ; ^{joumana.toufaily@ul.edu.lb" class="auth_mail} ; Tayssir Hamieh^c ; ^{tayssir.hamieh@ul.edu.lb" class="auth_mail} ; Jean-Pierre Fouassier^f ; Jacques Lalevé ; e^a ; ^{jacques.lalevee@uha.fr" class="auth_mail}
• 关键词：Dyes ; Halogen lamp ; Laser diode ; Cationic photopolymerization ; Visible light ; Photoinitiator
• 刊名：Dyes and Pigments
• 出版年：June, 2014
• 年：2014
• 卷：105
• 期：Complete
• 页码：121-129
• 全文大小：1290 K

文摘

Nine new photoinitiating systems based on a combination of new and established dyes (having an end capped polyenic structure) with an iodonium salt have been synthesized and tested for the polymerization of divinylether and epoxy monomers upon a visible light exposure. They exhibit a strong absorption in the 350-650聽nm range which well matches the visible light emission of different convenient visible light sources. Interestingly, very soft irradiation conditions can be employed. Excellent polymerization profiles have been obtained from selected dye iodonium salt combinations using a halogen amp or a laser diode 脿 457聽nm. The chemical mechanisms associated with these novel photoinitiating systems are investigated by steady-state photolysis and ESR experiments.