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Effect on Photopolymerization of the Structure of Amine Coinitiators Contained in Novel Polymeric Benzophenone Photoinitiators
Author(s) -
Wei Jun,
Wang Hongyu,
Jiang Xuesong,
Yin Jie
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600274
Subject(s) - photoinitiator , benzophenone , tmpta , photopolymer , polymer chemistry , monomer , chemistry , side chain , polymerization , amine gas treating , polymer , photochemistry , materials science , organic chemistry
Summary: By the polycondensation of TDI with DATBP or AATBP, and different coinitiator amines, six novel thio‐containing polymeric photoinitiators that contain a coinitiator amine and a side‐chain or in‐chain benzophenone (PUSBA or PUIBA) have been synthesized. FT‐IR, 1 H NMR, and GPC analyses confirm the structures of all polymers. The UV‐vis spectra indicate that the structure of the coinitiator amines has no significant influence on the maximal absorption. ESR spectra indicate that the polymeric photoinitiators that contain PDEA moieties can generate free radicals most efficiently. Three types of monomer with different functionality, EA, PPGDA, and TMPTA, are chosen to be initiated by these polymeric photoinitiators. The results show that the structure of the coinitiator amines has an important effect on the photopolymerization. For the PUSBA photoinitiators, the photoinitiator that contains N ‐phenyldiethanolamine as the coinitiator amine is the most efficient for EA, and that with N ‐butyldiethanolamine is the most efficient for both PPGDA and TMPTA. As for the PUIBA photoinitiators, that containing N ‐phenyldiethanolamine as the coinitiator amine is the most efficient for the polymerization of the three monomers.Structure of the polymeric photoinitiators with benzophenone moieties in the side chains.