Ethylene polymerization by thioether bridged dinuclear titanocene complex

摘要：

The thioether bridged metallocene complex (C5H5)Cl2TiC5H4 CH2CH22S has been synthesized by treating the dilithium salts of the thioether bridged cyclopentadicnyl ligand with two equivalents of C5H5TiCl3 and characterized by 1HMNR and elemental analysis. After activation with methylaluminoxane (MAO), the complex was highly active catalysts for homogeneous ethylene polymerization in toluene. The influence of the molar ratio MAO/Cat, the catalyst concentration, time and temperature have been studied systematically. The catalytic activity of 1 is 3.63×105 g PE/molCath. Rising the polymerization temperature decreases the catalytic activity for 1. A high concentration of the catalysts drops the catalytic activity as well as the molecular weight of polyethylene for the complex. High temperature gel permeation chromatography (HT-GPC) proves the production of polyethylene with a broad molecular weight distribution (MWD).

关键词： binuclear titanocene catalyst polymerization polyethylene

作者: Yujing Nie Ming Yang

作者单位: Department of Material Engineering, Hubei University of Automotive Technology, Hubei Shiyan 442002, China

会议类型: 国际会议

会议名称: 2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)

会议地点: 重庆

会议语种:英文

页码: 354-357

在线出版日期: 2011-01-21（万方平台首次上网日期，不代表论文的发表时间）