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Cationic Photoinitiators for Near UV and Visible LEDs: A Particular Insight into One‐Component Systems
Author(s) -
Zhang Jing,
Xiao Pu,
Dietlin Celine,
Campolo Damien,
Dumur Frederic,
Gigmes Didier,
MorletSavary Fabrice,
Fouassier JeanPierre,
Lalevée Jacques
Publication year - 2016
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.201500546
Subject(s) - cationic polymerization , visible spectrum , photopolymer , light emitting diode , photochemistry , polymerization , materials science , diode , component (thermodynamics) , chemistry , optoelectronics , polymer chemistry , polymer , composite material , physics , thermodynamics
The observed development of one‐component photoinitiators of cationic polymerization reactions in the last forty years is briefly described. Cationic photoinitiators can usually be activated by short wavelengths (<300 nm) and relatively hard conditions (high intensity). The search for cheaper and safer light sources has led to the use of Light Emitting Diodes (LEDs). In this review, a special emphasis is provided on the most recent and promising cationic initiators operating under near UV and visible LEDs. Ferrocenium salts exhibit the broadest visible light absorption and are probably, from this point of view, the most versatile near UV and visible light cationic initiators. Excellent photoinitiation performance has been found with the ferrocenium salts as one‐component initiators, and the effect of ferrocenium salts based multi‐component photoinitiating systems on the relevant photoinitiation performance has also been investigated.