α-蒎烯用新型复合引发剂共聚合反应研究——Ⅱ α-蒎烯/α-甲基苯乙烯共聚合反应研究

Cationic Copolymerization of α-Pinene With New Compound Initiator Ⅱ Studies on Copolymerization of α-Pinene and α-Methylstyrene

研究了在不同条件下,α-P/α-MSt的阳离子共聚合反应。5种类型的阳离子引发体系的比较表明,复合引发剂AlCl_3/SbCl_3的性能最优,共聚产率高,软化点也较高。IR、NMR、TG等分析证明,它有效地使α-P与α-MSt进行共聚,获得组分不同的共聚低聚体。α-MSt与苯乙烯不同、它在聚合过程中对α-P聚合起活化剂作用、同时又有明显的链终止剂的作用,以它为端基的阳离子增长链倾向于与自身单体反应形成稳定低聚体使聚合终止。

Copolymerization of α- pinene (α-P) and α-methylstyrene ( α-MSt) was investigated under various reaction conditions . The results showed that the copolymerzation with the compound initiator AlCl3/SbCl3 had highest yield and softening point among the five cationic initiator systems. The IR,NMR,TG analysis indicated that AlCl3/SbCl3 initiated effectively the copolymerozation of α-P and α-MSt, and copolymerization oligomers with different compositions were obtained. The functions of α-MSt were different from those of styrene. It acted not only as an activator that enhanced the polymerization rate of α- P, but also as a terminator that tended to form oligomer.