Bifunctional co-initiators: A new strategy for the design of efficient systems in radical photopolymerization reactions under air
作者： Mohamad Ali Tehfe , Mohamad El-Roz , Jacques Lalevée , Fabrice Morlet-Savary , Bernadette Graff
DOI: 10.1016/J.EURPOLYMJ.2012.01.022
关键词: Photopolymer 、 Bifunctional 、 Benzophenone 、 Light intensity 、 Chemistry 、 Photochemistry 、 Isopropylthioxanthone 、 Reactivity (chemistry) 、 Radical 、 Flash photolysis
摘要: Abstract Bifunctional co-initiators containing amine and silane groups (silylamines) are proposed for radical photopolymerization in experimental conditions (e.g. low light intensity, viscosity thin samples, UV visible exposure) where a strong deleterious oxygen effect occurs. In the presence of benzophenone, isopropylthioxanthone, camphorquinone, 2,6-diphenyl-4-(4′-dimethylaminophenyl) thiopyrylium tetrafluoroborate, chloro-HABI cleavable photoinitiators, these compounds show high reactivity under air, even better than that observed reference as hydrogen donor. The associated mechanisms investigated by laser flash photolysis (LFP) Kinetic ESR.
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