化学学报 ›› 2002, Vol. 60 ›› Issue (3): 509-513. 上一篇    下一篇

研究论文

高分子化Si桥联茂金属催化剂的合成及其催化乙烯聚合反应

诸海滨;金国新   

  1. 中国科学院长春应用化学研究所,长春(130022)
  • 发布日期:2002-03-15

Silane Bridged Polymerized Metallocene Catalyst for Ethylene Polymerization

Zhu Haibin;Jin Guoxin   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun(130022)
  • Published:2002-03-15

合成了硅桥上含乙烯基团的硅桥联茂金属催化剂[(CH_2=CH)CH_3Si(C_5H_4) _2]ZrCl_2 (3),并通过IR, ~1H NMR对化合物进行了表征,3在AIBN的引发下与苯 乙烯共聚形成高分子化的茂金属催化剂4。研究了3和4对乙烯聚合的能力,考察了 n(Al)/n(Zr)'温度对催化剂活性的影响。

关键词: 金属茂络合物, 催化剂, 乙烯, 聚合, 红外分光光度法, 质子磁共振谱法, 催化活性

The polymerized metallocene catalyst 4 was prepared by the co- polymerization of ansa-zirconocene complex [(CH_2=CH)CH_3Si(C_5H_4)_2] ZrCl_2 (3) containing vinyl substituted silane bridge with styrene in the presence of radical initiator. Catalyst 4 was found to display high ethylene polymerization activity of 2.28 * 10~6 g PE/(mol·h) with a viscosity average molecular weight (M_η) value of 61.6 * 10~3 using methylalumoxane (MAO) as a co-catalyst. The ethylene polymerization has been investigated under different conditions.

Key words: METALLOCENES, CATALYST, ETHYLENE, POLYMERIZATION, IR, 1HNMR, CATALYTIC ACTIVITY

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