Add time:09/09/2019         Source:sciencedirect.com

Layers of organic dye pigments dispersed in poly(vinyl butyral) can be used as heterogeneous sensitizers for the photopolymerization of trimethylolpropane triacrylate. Reactions of the bulk monomer with different 3, 4, 9, 10-perylenetetracarboxylic diimides and copper phthalocyanine were studied by means of real-time IR spectroscopy. Compared to all polymerizations sensitized with perylene diimide layers, the relative rate of polymerization rp of reactions sensitized with the phthalocyanine layer is higher. In all cases, an increase of the pigment concentration leads to higher rp values. No simple relationship exists between incident light intensity and rp values. The initiating activity of the pigments correlates with the maximum voltage Umax of their photo-emf.

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