The Effect of Cationic Salt on Photoinitiated Free Radical Polymerization Using Polysilanes

Abstract

Abstract Photoinitiated free radical polymerization of methylmethacrylate (MMA), (Nisopropylcarbamate) ethylpropenoate (CL-960) and tripropyleneglycol diacrylate (TPGDA) by using polysilanes in the presence of N-ethoxy-2 methyl pyridinium hexafluorophosphate (EMP+ PF6) and diphenyliodonium hexaflurophosphate (Ph2l+ PF6) was studied. In the presence of the cationic salts the rate of photopolymerization was significantly increased The effect was attributed to the oxidation of silyl radicals formed from the photoscission of polysilane by pyridinium or diphenliodonium salts. The resulting radicals species are more capable of initiating the radical polymerization.