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| 哌嗪-二氧化硫电荷转移复合物引发的甲基丙烯酸甲酯光聚合 | |
| 引用本文： | 高青雨,杜福胜,李润明,杨更须,俞贤达.哌嗪-二氧化硫电荷转移复合物引发的甲基丙烯酸甲酯光聚合[J].影像科学与光化学,2001,19(2). |
| 作者姓名： | 高青雨 杜福胜 李润明 杨更须 俞贤达 |
| 作者单位： | 1. 河南大学润滑与功能材料实验室,中国科学院兰州化学物理研究所, 2. 北京大学化学学院高分子科学与工程系, 3. 河南大学润滑与功能材料实验室, 4. 中国科学院兰州化学物理研究所, |
| 基金项目： | 河南省科技厅科研项目 |
| 摘 要： | 本文研究了哌嗪 (PPZ)与二氧化硫 (SO2 )电荷转移复合物 (CTC)的制备及其作为光引发剂引发甲基丙烯酸甲酯 (MMA)的聚合 ,发现PPZ/SO2 摩尔比对聚合速率影响甚大 .当PPZ/SO2 为 1∶2时 ,形成了具有潜在引发能力的复合物 (Ⅰ ) .Ⅰ引发MMA光聚合的动力学关系式为Rp =Kp Ⅰ ] 0 .34MMA] 1.0 6 ,表观活化能为 2 3 7kJ/mol.并对引发机理进行了探讨 |
| 关 键 词： | 哌嗪二氧化硫电荷转移复合物 光引发剂 甲基丙烯酸甲酯 光聚合 |
PHOTOPOLYMERIZATION OF METHYL METHACRYLATE USING PIPERAZINE-SULFUR DIOXIDE CHARGE-TRANSFER COMPLEX AS A PHOTOINITIATOR |
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| Abstract: | Photopolymerization of methyl methacrylate (MMA) was kinetically studied by using piperazine (PPZ)-sulfur dioxide (SO2) charge-transfer complex as a photoinitiator. It was found that the polymerization rate (Rp) was dependent on the molar ratio of piperazine to sulfur dioxide, and the complex(Ⅰ) with a composition of PPZ／SO2＝1／2 in molar ratio was the most effective. By using Ⅰ as the photoinitiator, the polymerization kinetics can be expressed as Rp=Kp ［Ⅰ］0．34［MMA］1．06, and the apparent activation energy (Ea) value was obtained to be 23.7 kJ/mol. A possible polymerization mechanism was also proposed. |
| Keywords: | piperazine sulfur dioxide charge transfer complex photoinitiator methyl methacrylate photopolymerization |
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