摘要
研究了阳离子引发体系 Me3 Si Cl(TMSCl) Et Al Cl2 在正己烷中引发的 1,3 戊二烯 (PD)聚合反应。研究结果表明 ,在 Et Al Cl2 引发的 PD聚合反应中引入 TMSCl后大幅度提高了聚合物产率 ,同时使聚合反应速率明显提高 ,在 [TMSCl] [Et Al Cl2 ]=0～ 1范围内 ,TMSCl Et Al Cl2 体系制备的聚合物分子量高于 Et Al Cl2 引发制备的聚合物 ,这些结果表明 Me3 Si Cl Et Al Cl2 体系对 PD具有较高的引发活性。 1 H NMR和结构分析证明 TMSCl水解生成的 HCl和 Et Al Cl2 络合物引发 PD聚合。
Cationic polymerizations of 1,3 pentadiene(PD) by Me 3SiCl(TMSCl)/EtAlCl 2 initiating system were studied. By the introduction of TMSCl, the polymer yield prepared by EtAlCl 2 is greatly increased, and the polymerization rate of TMSCl/EtAlCl 2 system is 6 times higher than that of EtAlCl 2. The molecular weight of the polymer is also raised by adding TMSCl and shows a maximum in the range of [TMSCl]/[EtAlCl 2]=0~1. These observations indicate that TMSCl/EtAlCl 2 initiating system has an higher activity for cationic polymerization of PD than EtAlCl 2 alone. 1H NMR results show that the polymerization is indeed initiatied by EtAlCl 2 in combination with HCl resulting from hydrolysis of TMSCl by adventitious water.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第1期39-41,共3页
Polymer Materials Science & Engineering
基金
国家自然科学基金!资助项目 ( 2 95 0 40 3 2 )
