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

作　　者：柳忠阳[1] 王军[1] 徐德民[1] 贺大为[1] 胡友良[1] 

机构地区：[1]中国科学院化学研究所分子科学中心工程塑料国家重点实验室,北京100080

出　　处：《高分子学报》2001年第4期509-512,共4页Acta Polymerica Sinica

基　　金：国家重点自然科学基金项目 (基金号 2 973 4 14 1)和SINOPEC联合资助

摘　　要：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.

关 键 词：原位聚合 制备 LIDPE 载体茂金属催化剂 聚乙烯 烷基铝 催化助剂 乙烯 

分 类 号：O632[理学—高分子化学]