α-氯代乙苯/TiCl_4引发体系的α-蒎烯/苯乙烯共聚合

Cationic Copolymerization of αPinene and Styrene Initiated by αChloroethylbenzene/TiCl4

研究了α－氯代乙苯／ＴｉＣｌ４引发体系的α－蒎烯／苯乙烯共聚合性能。通过ＧＰＣ及微臭氧化－薄层层析法表征分析，证明该引发体系可使α－蒎烯／苯乙烯在较宽单体投料比范围内实现有效共聚；提高ＴｉＣｌ４浓度可使共聚单体转化率差缩小，而共聚产物的相对分子质量及相对分子质量分布基本不变；Ｅｔ３Ｎ的加入可缩小α－蒎烯／苯乙烯的聚合反应活性差，并明显提高共聚产物的相对分子质量。

he cationic copolymerization of αpinene and styrene initiated by αchloroethylbenzene(PEC)/TiCl4 has been investigatedAnalyzed by GPC and ozonizationTLC methods,it is concluded that αpinene and styrene can copolymerize effectively with wide range of monomer feed ratios by PEC/TiCl4 initiating systemThe increased concentration of TiCl4 reduces the conversion difference between α pinene and styrene of the copolymerization,and has no obvious effect on the molecular weight of the products,so that higher [TiCl4] is beneficial to the copolymerization of αpinene and styrene with PEC/TiCl4Added Et3N can reduce the reactivity difference between αpinene and styrene,and induce higher molecular weight products with more narrow MWD