Enhancement Mechanisms of Photoinitiation System as Incorporating Chemical Additives as Accelerators

Quenching of imidazoyl radical (Im ) formed in photoinitiator systems comprising an aminostyryl dye and a radical generating reagent by a 2-mercaptobenzothiazole(MBT): radical generating reagent;
2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyi-l, I '-bi-IH-imidazole (BI) in a poly(methyl methacrylate) film has been investigated by laser flash photolysis using a total reflection cell.