Novel,highly efficient polymeric benzophenone photoinitiator containing coinitiator moieties for photopolymerization |
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| Authors: | Jun Wei Rong Lu Fang Liu |
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| Institution: | Department of Polymer Materials and Engineering, School of Material Engineering, Key Laboratory for Ecological‐Environment Materials of Jiangsu Province, Yancheng Institute of Technology. No. 9, Yingbin Avenue, Yancheng City, 224051, People's Republic of China, China |
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| Abstract: | A novel polymeric photoinitiator P(MPBP‐co‐DMAEMA), bearing side‐chain benzophenone (BP) and coinitiator amine, was synthesized through free radical copolymerization of a polymerizable photoinitiator, 4‐(4‐maleimido)phenoxy]benzophenone (MPBP), and a polymerizable coinitiator amine, N, N‐dimethylaminoethyl methacrylate (DMAEMA). In order to find out the influences of coinitiator amine on photopolymerization, a polymeric coinitiator amine, P(DMAEMA), was also synthesized for comparison. FT‐IR, 1H NMR, and GPC analyses confirm the structures of polymers. The UV‐Vis spectra of polymeric photoinitiator P(MPBP‐co‐DMAEMA) and polymerizable photoinitiator MPBP are similar, and both exhibit high red‐shifted maximal absorption as compared with BP. The photopolymerization of 1,6‐hexanediol diacrylate (HDDA) and trimethylolpropane triacrylate (TMPTA), initiated by MPBP/DMAEMA, MPBP/P(DMAEMA), and P(MPBP‐co‐DMAEMA) systems, was studied by photo‐DSC. The results indicate that P(MPBP‐co‐DMAEMA) is most efficient for the polymerization of both HDDA and TMPTA, and MPBP/P(DMAEMA) is the least efficient of the three photoinitiating systems. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | polymeric photoinitiator polymerizable photoinitiator photopolymerization benzophenone coinitiator amine |
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