活性阴离子聚合合成结构可控的PS-g-PA6  

Synthesis of graft copolymer of polystyrene and polyamide 6 by activated anionic polymerization

作　　者：张才亮[1,2] 顾雪萍[1,2] 冯连芳[1] 胡国华 

机构地区：[1]浙江大学化学工程国家重点实验室,浙江杭州310027 [2]法国洛林理工学院化学工程与科学实验室,法国南锡54001

出　　处：《浙江大学学报（工学版）》2008年第12期2195-2198,2211,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家“973”重点基础研究发展规划资助项目(2001CB711203)

摘　　要：为探明反应挤出过程的原位聚合相容过程,设计了PS/PS-g-PA6/PA6聚合物体系,对相容剂形成过程进行分析以实现反应过程的可控.在催化剂己内酰胺钠(NaCL)存在的条件下,3-异丙烯基-α,α-二甲基苄基异氰酸酯(TMI)和苯乙烯(St)共聚物(PS-co-TMI)中异氰酸官能团引发己内酰胺(CL)聚合,合成了可控结构的接枝共聚物PS-g-PA6.结果表明:当聚合反应温度低于200℃时,CL的转化率低于30%;增加NaCL的用量,可减短聚合反应的诱导期,提高反应速率;PS-co-TMI中TMI的质量分数越高,聚合反应的诱导期越短,生成的PA6支链越短;PS-co-TMI与CL质量比对聚合反应的诱导期基本上没有影响.接枝聚合合成PS-g-PA6的较佳条件是:反应温度高于220℃,催化剂的质量分数高于3%,PS-co-TMI中TMI的质量分数高于2%.In-situ polymerization and in-situ compatibilization is a new way to prepare polymer bends. In order to make clear the compatibilization process, the compatibilizer synthesis should be analyzed firstly to achieve the controllable reaction. In the presence of catalyst sodium caprolactam （NaCL）, 3-isopropenyl-α, α-dimethylbenzyl isocyanate （TMI） bearing the copolymer （PS-co-TMI） of Styrene （St） initiates the activated anionic polymerization of ε-caprolactam （CL） to form a graft copolymer of the controllable structure with PS as backbone and PA6 as graft. Results suggested that the polymerization temperature should be higher than 200 ℃ an increase in the amount of NaCL leads to a decrease in the induction time of polymerization and an increase in polymerization rate; increasing the TMI content in PS-co-TMI may decrease the induction time of polymerization and the length of PA6 graft; the mass ratio of PS-co-TMI to CL has no effect on the induction time. Therefore, the optimal condition for the synthesis of PS-g-PA6 is that the temperature is above 220℃, the content of catalyst is higher than 3 % and at the same time the content of TMI in PS-co-TMI is higher than 2%.

关 键 词：原位聚合 阴离子聚合 聚苯乙烯 尼龙6 接枝共聚物 

分 类 号：TQ316.3[化学工程—高聚物工业]