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  

PHOTOPOLYMERIZATION OF METHYL METHACRYLATE USING PIPERAZINE-SULFUR DIOXIDE CHARGE-TRANSFER COMPLEX AS A PHOTOINITIATOR

作　　者：高青雨[1,2] 李润明[3] 杨更须[3] 俞贤达[1] 杜福胜[4] 

机构地区：[1]中国科学院兰州化学物理研究所 [2]河南大学润滑与功能材料实验室,开封475001 [3]河南大学润滑与功能材料实验室 [4]北京大学化学学院高分子科学与工程系

出　　处：《感光科学与光化学》2001年第2期116-121,共6页Photographic Science and Photochemistry

基　　金：河南省科委资助项目 !(0 0 4 0 3 2 80 0 )

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 .34[MMA] 1.0 6 ,表观活化能为 2 3 7kJ/mol.Photopolymerization of methyl methacrylate (MMA) was kinetically studied by using piperazine (PPZ) sulfur dioxide (SO 2) charge transfer complex as a photoinitiator. It was found that the polymerization rate ( R p) was dependent on the molar ratio of piperazine to sulfur dioxide, and the complex(Ⅰ) with a composition of PPZ/SO 2=1/2 in molar ratio was the most effective. By using Ⅰ as the photoinitiator, the polymerization kinetics can be expressed as R p= K p [Ⅰ] 0.34 [MMA] 1.06 , and the apparent activation energy ( E a) value was obtained to be 23.7 kJ/mol. A possible polymerization mechanism was also proposed.

关 键 词：哌嗪-二氧化硫电荷转移复合物 聚甲基丙烯酸甲酯 光引发剂 甲基丙烯酸甲酯 光聚合 

分 类 号：O631.5[理学—高分子化学] O644.1[理学—化学]