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Rubrene‐Based Green‐Light‐Sensitive Photoinitiating Systems of Polymerization
Author(s) -
Xiao Pu,
Zhang Jing,
Graff Bernadette,
Fouassier Jean Pierre,
Lalevée Jacques
Publication year - 2017
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.201700314
Subject(s) - photopolymer , photochemistry , chemistry , cationic polymerization , rubrene , radical , polymerization , photodissociation , radical polymerization , photoinitiator , light intensity , polymer chemistry , polymer , organic chemistry , optics , monomer , physics
Rubrene, a compound that exhibits green light absorption, interacts with an iodonium salt through its excited singlet state to generate cations and free radicals under a green laser line at 532 nm or a halogen lamp delivering a low light intensity of polychromatic visible light. The photochemical mechanisms are investigated by steady‐state photolysis, fluorescence, electrochemistry, and electron spin resonance spin trapping techniques. The produced cations and free radicals initiate both the cationic photopolymerization of epoxides and the free radical photopolymerization of acrylates. Moreover, the addition of N ‐vinylcarbazole into the system enhances the photopolymerization efficiency. The Rubrene/amine/chlorotriazine photoinitiating system also exhibits a much higher photoinitiation ability for the free radical photopolymerization of acrylates.