1. Institut de Science des Matériaux de Mulhouse, , 68057 Mulhouse Cedex, France;2. Aix‐Marseille Université, CNRS, Institut de Chimie Radicalaire, , F‐13397 Marseille, France;3. Formerly: UHA‐ENSCMu, , 68093 Mulhouse
Abstract:
Truxene–acridine‐1,8‐dione derivatives ( Tr_AD ) are proposed as new photoinitiators of polymerization under very soft irradiation (by a household halogen lamp), as well as laser‐diode exposure at 405 nm. They exhibit a strong absorption around 380 nm. The Tr_AD /diphenyl iodonium salt/9‐vinylcarbazole combination is able to promote the ring‐opening polymerization of an epoxide, whereas the Tr_AD /alkyl halide/amine system is very efficient in initiating the radical photopolymerization of an acrylate. Excellent polymerization profiles are obtained. Acrylate/epoxide blends are also easily polymerized. These Tr_ADs in the three‐component systems behave as photocatalysts according to oxidative cycles. The mechanisms are discussed for the different multicomponent initiating systems.
