Fig. 4. Cationic photopolymerization profiles (epoxy function conversion vs. irradiation time) of CADE monomers, initiated by a two-component photoinitiating system based on diphenyliodonium salt (1% wt) and 2-(diethylamino)-4-(1-ethylpropyl)-6-phenyl-benzene-1,3-dicarbonitrile derivatives (0.1% wt) under irradiation at 405 nm (8.13 mW cm⁻²).The reference was bis-(4-t-butylphenyl)iodonium hexafluorophosphate (1% wt) without sensitiser.