载体茂金属用于原位聚合反应制备LLDPE研究

STUDY ON POLYMERIZATION FOR LLDPE BY COMBINING SUPPORTED METALLOCENE AND Ti(O n-Bu)_4 AS CATALYSTS

以Ti(OR) 4为二聚催化剂 ,以载体茂金属催化剂为共聚合催化剂 ,以烷基铝为唯一助催化剂 ,在乙烯为聚合单体的条件下原位聚合制备LLDPE ,成功地解决了两种催化剂之间的相互干扰的问题 ,该催化剂体系具有聚合活性高 ,所得聚合物密度低 。

An alternative route was investigated to prepare linear lower density polyethylene with a single monomer, ethylene,and a dual functional catalytic system for ethylene polymerization in situ using Ti(On-Bu)(4)/AlEt3 as dimerization catalyst and supported metallocene as its copolymerization catalyst. The two catalysts were wen matched in a single reactor and the short-branched polyethylene made from this catalytic system had the characteristics of low melting point, low density, high activity and proper-granule morphology of polyethylene.