| A SENSITIZED PHOTOINITIATION SYSTEM ——BIS (7-DIETHYLAMINO COUMARIN ) KETONE-3 AND DIPHENYLIODONIUM SALT COMBINATION |
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| 引用本文： | 李军,汪秀智,杨永源,李妙贞,王尔.A SENSITIZED PHOTOINITIATION SYSTEM ——BIS (7-DIETHYLAMINO COUMARIN ) KETONE-3 AND DIPHENYLIODONIUM SALT COMBINATION[J].高分子科学,1993,0(3):249-254. |
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| 作者姓名： | 李军 汪秀智 杨永源 李妙贞 王尔 |
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| 作者单位： | Institute of Photographic Chemistry，Academia Sinica，Beijing，Institute of Photographic Chemistry，Academia Sinica，Beijing，Institute of Photographic Chemistry，Academia Sinica，Beijing，Institute of Photographic Chemistry，Academia Sinica，Beijing，Institute of Photographic Chemistry，Academia Sinica，Beijing |
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| 摘 要： | Bis (7-diethylaminocoumarin) ketone- 3(DACK) and diphenyliodonium salt (DPIO)combination as an effective photoinitiation system for radical polymerization has been investigated. The sensitized photolysis of DACK/DPIO leads to bleaching of DACK and decomposition of DPIO to generate initiating radical species. The electron transfer sensitization occurs mainly from the triplet state of DACK. The photobleaching obeyed a second-order kinetics and the rate constant was evaluated to be 31.3mol~(-1)·1·s~(-1) Photopolymerization of MMA initiated by DACK/DPIO was carried out in acetonitrile solution. The polymerization rate was found to be proportional to the concentration of DACK, DPIO and MMA with the exponents of 0.34, 0.40 and 1.0 respectively. The initiated efficiency is comparable to those of small molecular ketones.The sensitized photoinitiation mechanism has been discussed.
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| 收稿时间： | 1992-03-31 |
A SENSITIZED PHOTOINITIATION SYSTEM ——BIS (7-DIETHYLAMINO COUMARIN ) KETONE-3 AND DIPHENYLIODONIUM SALT COMBINATION |
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| LI Jun,WANG Xiuzhi,YANG Yongyung,LI Miaozhen,WANG Erjian.A SENSITIZED PHOTOINITIATION SYSTEM ——BIS (7-DIETHYLAMINO COUMARIN ) KETONE-3 AND DIPHENYLIODONIUM SALT COMBINATION[J].Chinese Journal of Polymer Science,1993,0(3):249-254. |
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| Authors: | LI Jun WANG Xiuzhi YANG Yongyung LI Miaozhen WANG Erjian |
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| Institution: | Institute of Photographic Chemistry; Academia Sinica; Beijing |
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| Abstract: | Bis (7- diethylaminocoumarin) ketone- 3(DACK) and diphenyliodonium salt (DPIO)combination as an effective photoinitiation system for radical polymerization has been investigated. The sensitized photolysis of DACK/DPIO leads to bleaching of DACK and decomposition of DPIO to generate initiating radical species. The electron transfer sensitization occurs mainly from the triplet state of DACK. The photobleaching obeyed a second-order kinetics and the rate constant was evaluated to be 31.3mol-1·1·s-1 Photopolymerization of MMA initiated by DACK/DPIO was carried out in acetonitrile solution.The polymerization rate was found to be proportional to the concentration of DACK,DPIO and MMA with the exponents of 0.34,0.40 and 1.0 respectively.The initiated efficiency is comparable to those of small molecular ketones.The sensitized photoinitiation mechanism has been discussed. |
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| Keywords: | Bis ( 7- diethylaminocoumarin ) ketone-3 ( DACK) Diphenyliodonium tetrafluoroborate (DPIO) Sensitive photoinitiation system Triplet sensitizers |
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