Sensitizer Dyes and Sensitization Mechanisms in Photopolymer Coating Layer II

Quenching of imidazoyl radical (Im•) formed in photoinitiator systems comprising an aminostyryl-dye and a radical generating reagent by a 2-rnercaptobenzothiazole (MBT):aminostyryl-dye; 2-[p- (diethylamino)styryl]naphtho[1, 2-d]thiazole (NAS), radical generating reagent; 2, 2′-bis(2-chlorophenyl)- 4, 4′, 5, 5′-tetraphenyl-1, 1′-bi-1H-imidazole (BI) in a poly(methyl methacrylate) film has been investigated by laser flash photolysis using a total reflection cell.