聚乙烯
结晶度
催化作用
聚合
材料科学
乙烯
化学工程
纳米-
高分子化学
复合材料
化学
聚合物
有机化学
工程类
作者
Xiaochen Dong,Li Wang,Jinghong Zhou,Haipeng Yu,Tianxu Sun
标识
DOI:10.1016/j.catcom.2005.07.018
摘要
A novel TiCl4/MCM-41 catalyst was prepared for ethylene polymerization. MCM-41 had one-dimension and hexagonal porous structure. With this catalytic system, the nano-polyethylene fibres could be synthesized when the active sites on the exterior of MCM-41 were destroyed by hydroxy groups in β-cyclodextrin. The diameter of the resulting fibre is about 50 nm, which suggests that TiCl4/MCM-41 catalyst is useful for the preparation of nano-polyethylene fibres. The effect of the catalyst support MCM-41 on the melting points of the resulting PE was systematically investigated too. Compared to TiCl4/SiO2 catalysts, it was found that melting points and crystallinity of resulting PE prepared using TiCl4/MCM-41 catalytic system were significantly increased. The possible formation mechanism for the resulting polyethylene fibres was proposed.
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