新型咪唑侧链桥联单茂Zr催化降冰片烯聚合活性研究

Studies on the Activity of the Novel Imidazole Functionalized Zirconocene for Norbornene Polymerization

本文通过催化降冰片烯的聚合,研究了以桥联的茚基咪唑基配体与第四副族金属锆(IV)为原料合成的两种新型的烯烃聚合催化剂的活性。通过控制反应温度,助催化剂甲基铝氧烷(MAO)的用量得到了最佳反应条件为Al/Zr为700∶1,温度为70℃,催化剂对降冰片烯聚合的最高活性为14.85 kg/mol.h。并通过核磁,红外数据的分析得出,在最优条件下降冰片烯主要以加成聚合为主。

This article studied mainly the activities of two kind of novel Zirconocenes as catalyst for norbornene polymerization. The activities were determined under different conditions. The reaction temperature and the ratio of Al/Zr have shown great effect on the catalyst activities, and the optimal temperature is 70 ℃, the best ratio of Al/Zr is 700： 1. The polynorbornene measured by FT-IR spectra and NMR analysis was mainly in addition polymerization.