Abstract: The photopolymerization of phenylglycidylether(PGE)and an epoxy resin (E-51) initiated by bis-[4-(diphenylsulfonio)phenyl]sulfide-bis-hexafluorophosphate[BDS(PF₆)₂] has been studied using a modified home-made CDR-1 model differential scanning calorimeter. For PGE,the polymerization rate was proportional to the 0.90 power of the initiator concentration and to the 0.87 power of the light intensity. For E-51,the polymerization rate was proportional to the 0.78 power of the initiator concentration, whereas the influence of light intensity was rather complicated. The polymerization rate increased with temperature markedly at≤70℃(for PGE) or≤80℃(for E-51).PGE as a reactive diluent greatly increased the polymerization rate of E-51.

Key words: phenylglycidylether, epoxide, sulfonium salt, photopolymerization, DSC