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Diethoxyacetate Salts as Co‐initiators for Radical Photosensitive Resins: Towards Aromatic Amine‐Free Systems?
Author(s) -
Abdallah Mira,
Al Mousawi Assi,
Nechab Malek,
Hijazi Akram,
Fouassier JeanPierre,
Dumur Frédéric,
Lalevée Jacques
Publication year - 2019
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201900129
Subject(s) - polymerization , amine gas treating , photochemistry , chemistry , radical polymerization , photopolymer , polymer chemistry , aromatic amine , polymer , organic chemistry
Diethoxyacetate salts are investigated as new co‐initiators for the free radical polymerization (FRP) of (meth)acrylates upon visible light exposure, with light emitting diodes (LEDs; 405 nm, 477 nm) being employed for this purpose. Interestingly, the impact of the counter cation on their initiating ability is clearly highlighted. When these co‐initiators are combined with commercial photoinitiators such as 2‐isopropylthioxanthone (ITX) or camphorquinone (CQ), good to excellent free radical polymerization initiating performances are found and high final reactive function conversions are achieved. In the absence of these co‐initiators, no or poor polymerization occurs, clearly highlighting the importance of these co‐initiators for an efficient process. These systems can be interesting for the replacement of aromatic amines opening the way for amine‐free Type II photoinitiating systems.