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Acridinediones: Effect of Substituents on Their Photoinitiating Abilities in Radical and Cationic Photopolymerization
Author(s) -
Xiao Pu,
Dumur Frédéric,
Tehfe MohamadAli,
Graff Bernadette,
Gigmes Didier,
Fouassier Jean Pierre,
Lalevée Jacques
Publication year - 2013
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.201300363
Subject(s) - photopolymer , cationic polymerization , photochemistry , flash photolysis , chemistry , photodissociation , electron paramagnetic resonance , halogen lamp , polymer chemistry , acrylate , polymer , polymerization , kinetics , organic chemistry , reaction rate constant , copolymer , optics , physics , nuclear magnetic resonance , quantum mechanics
Ten acridinediones (ADs) with different substituents are prepared and investigated for their abilities to initiate a ring‐opening cationic photopolymerization in combination with an iodonium salt and N ‐vinylcarbazole upon UV–vis light (Xe–Hg lamp; >330 nm) or visible light (halogen lamp) exposure. The structural effects in the ADs are outlined. The cationic and radical photopolymerization of an epoxide/acrylate blend in a one‐step hybrid cure very efficiently leads to the formation of an interpenetrated polymer network under UV–vis light or visible light irradiation (30 s for tack‐free coatings). The photochemical mechanisms are studied by molecular orbital calculations, steady‐state photolysis, electron spin resonance–spin trapping, cyclic voltammetry, fluorescence, and laser flash photolysis techniques.