Carbazole-based compounds as photoinitiators for free radical and cationic polymerization upon near visible light illumination

Assi Al Mousawi (1, 2) , Ahmad Arar (1) , Malika Ibrahim-Ouali (3) , Sylvain Duval (4) , Frederic Dumur (5) , Patxi Garra (1) , Joumana Toufaily (2) , Tayssir Hamieh (2) , Bernadette Graff (1) , Didier Gigmes (5) , Jean-Pierre Fouassier (1) , Jacques Lalevee (1)

1 IS2M - Institut de Science des Matériaux de Mulhouse
2 MCEMA - Laboratoire de Matériaux, Catalyse, Environnement et Méthodes Analytiques
3 ISM2 - Institut des Sciences Moléculaires de Marseille
4 UCCS - Unité de Catalyse et Chimie du Solide - UMR 8181
5 ICR - Institut de Chimie Radicalaire

Six new carbazole based compounds (Ca1-Ca6) are synthesized and proposed as high performance photoinitiators with iodonium salt (iod) and/or an amine (EDB) for both the free radical polymerization (FRP) of acrylates and the cationic polymerization (CP) of epoxides upon near UV and visible light exposure using light emitting diodes (LEDs) @385 nm and @405 nm. Excellent polymerization initiating abilities are found and high final reactive function conversions are acquired. A full picture of the involved photochemical mechanisms is given.

Domaines: Polymères

Assi Al Mousawi, Ahmad Arar, Malika Ibrahim-Ouali, Sylvain Duval, Frederic Dumur, et al.. Carbazole-based compounds as photoinitiators for free radical and cationic polymerization upon near visible light illumination. Photochemical & Photobiological Sciences , 2018, 17 (5), pp.578-585. ⟨10.1039/c7pp00400a⟩. ⟨hal-02091290⟩