Photo-polymerization kinetics of acrylate monomer initiated by bis [2-(ochlorophenyl)-4,5-diphenylimidazole] compound photo-initiator system

Photo-polymerization kinetics of acrylate monomer initiated by bis [2-(ochlorophenyl)-4,5-diphenylimidazole] compound photo-initiator system were investigated by real-time infrared(RT-IR),while NMR and UV was used for characterization,respectively.In synthetic system BCIM was used as photo-initiator,N,N-bis(diethylamino) benzophenone(EMK) was used as photo-sensitizer and N-phenylglycine(NPG) was used as hydrogen donor.The kinetics was determined by real-time infrared(RT-IR).The results showed that the polymerization rate and the double bond conversion increased with the initiator concentration while the mass ratio m(BCIM): m(EMK): m(NPG) was 10: 5: 5.The optimum initiate efficiency of 96.7% and the polymerization rate of above 90% with diacrylate monomer were better than that with triacrylate monomer.It was also found that the polymerization rate could increase with light intensity.