基于RAFT过程的N-(4-羧基苯基)马来酰亚胺和苯乙烯可控自由基共聚合

Controlled Radical Copolymerization of N-(4-Hydroxyphenyl) Maleimide and Styrene Based on RAFT Process

采用N-(4-羧基苯基)马来酰亚胺为单体,四氢呋喃做溶剂,偶氮二异丁腈为引发剂,以RAFT试剂二硫代苯甲酸苄酯为链转移剂,成功地进行了N-(4-羧基苯基)马来酰亚胺和苯乙烯的共聚合反应。结果表明,得到的聚合物数均分子量随单体转化率增加而呈线性增加,且聚合物的分子量分布小于1.5,二硫代苯甲酸苄酯显示出对聚合反应的良好控制作用。通过不同反应温度的聚合反应动力学得到共聚合反应的表观活化能为1.39 kJ/mol。

Copolymerization of N-（4-carboxyphenyl） maleimide with styrene was introduced in tetrahydrofuran by taking S-benzyl dithiobenzoate as a RAFT reagent. Results show that the number average molecular weight of the obtained copolymers increases linearly with the increase of the monomer conversion and the distributions of the copolymers are less than 1.5, showing that the RAFT regent S-benzyl dithiobenzoate possesses a good ability to control the copolymerization of N-（4-carboxyphenyl） maleimide with styrene. Investigations of the copolymerization at different temperatures gave the apparent activation energy about 1.39 kJ/mol.