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A Multicolor Photoinitiator for Cationic Polymerization and Interpenetrated Polymer Network Synthesis: 2,7‐Di‐ tert ‐butyldimethyldihydropyrene
Author(s) -
Tehfe MohamadAli,
Dumur Frédéric,
Vilà Neus,
Graff Bernadette,
Mayer Cédric R.,
Fouassier Jean Pierre,
Gigmes Didier,
Lalevée Jacques
Publication year - 2013
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300302
Subject(s) - photoinitiator , cationic polymerization , photopolymer , materials science , polymerization , photochemistry , acrylate , monomer , polymer , polymer chemistry , photochromism , acrylate polymer , visible spectrum , chemistry , optoelectronics , composite material
For polymer synthesis upon visible light, actual photoinitiator operates in a restricted part of the spectrum. As a consequence, several photoinitiators are necessary to harvest all of the emitted visible photons. Herein, 2,7‐di‐ tert ‐butyldimethyldihydropyrene is used for the first time as a multicolor photoinitiator for the cationic polymerization of epoxides. Upon addition of diphenyliodonium hexafluorophosphate and optionally N‐vinylcarbazole, the originality of this approach is to allow efficient monomer conversions under various excitation light sources in the 360–650 nm wavelength range: halogen lamps, and light‐emitting and laser diodes. The synthesis of an interpenetrated polymer network from an epoxide/acrylate blend using a red light at 635 nm is also feasible. The formed polymer material exhibits a photochromic character.