催化作用
烷基
聚乙烯
齐格勒-纳塔催化剂
纳塔
摩尔质量分布
高分子化学
聚合
乙烯
烯烃
材料科学
化学
化学工程
有机化学
聚合物
工程类
作者
Keiko Fukuda,B Liu,Hisayuki Nakatani,Isa Nishiyama,Mikio Yamahiro,Minoru Terano
标识
DOI:10.1016/j.catcom.2003.10.001
摘要
In this work, a novel surface functionalized SiO2-supported Ziegler-Natta catalyst was developed for ethylene polymerization. A state-of-the-art control of some unique characteristic catalytic properties on the surface functionalized SiO2-supported catalyst analogized from the previously reported poly[propylene-co-(7-methyl-1,6-octadiene)]-supported Ziegler-Natta catalyst had been successfully realized through a precise molecular level catalyst design on the silica gel surface functionalized with linear long alkene chains through the reaction between unsaturated alcohol 9-decene-1-ol and hydroxyl groups on the silica surface. The active sites of this SiO2-supported catalyst prepared in this study showed very stable activity without obvious deactivation for more than 50 h and the molecular weight distribution of polyethylenes varied significantly from narrow and unimodal to broad and multimodal by solely changing the type of Al-alkyl cocatalyst from diethylaluminumchloride to triethylaluminum.
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