Citation: . DYE-SENSITIZED PHOTOPOLYMERIZATION OF METHYL METHACRYLATE INITIATED BY COUMARIN DYE/IODONIUM SALT SYSTEM*[J]. Chinese Journal of Polymer Science, ;1999, 17(6): 589-594. shu

DYE-SENSITIZED PHOTOPOLYMERIZATION OF METHYL METHACRYLATE INITIATED BY COUMARIN DYE/IODONIUM SALT SYSTEM*

Received Date: 9 January 1999

The photosensitive initiating system composed of 7-diethylamino-3-(2'-benzimidazolyl)coumarindye (DEDC) and diphenyliodonium hexafluorophosphate (DIHP) which act as the sensitizer and the initiatorrespectively, can be used to initiate the polymerization of methyl methacrylate (MMA). The results showedthat when exposed to visible light, coumarin dye/iodonium salt undergoes quick electron transfer from DEDCto DIHP and free radicals are produced. The visible light photoinduced reaction between DEDC and DIHP is mainly through the excited singlet state of DEDC and thus it is a little sensitive to O2.The influence of concentration of DEDC,DIHP and MMA on the rate of photopolymerization of MMA was also investigated.
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