Preparation of long-branched polyethylene by in situ poly-merization using late transition metal and metallocene catalysts  

作　　者：LIU Zhongyang GUO Cunyue MAZhi WANG Jun XU Demin HE Dawei HU Youliang 

机构地区：[1]State Key Lab of Engineering Plastics,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China [2]Beijing Lab of Catalysis,China National Petroleum Corporation Key Lab of Catalysis,Beijing 100080,China

出　　处：《Chinese Science Bulletin》2001年第24期2054-2057,共4页

基　　金：This work was supported hy the National Natural Science Foundation of China and China Petroleum Corporation (Grant No. 29734141).

摘　　要：An in situ polymerization method was investigated to prepare long-branched polyethylene (LBPE) with ethylene alone and a single cocatalyst, methylalumoxane (MAO), by using a dual functional catalytic system containing late transition metal oligomerization catalyst and metal-locene copolymerization catalyst. The obtained long-branched polyethylene has the characteristics of low melting point, high activity and well-dispersed sequence distribution.An in situ polymerization method was investigated to prepare long-branched polyethylene (LBPE) with ethylene alone and a single cocatalyst, methylalumoxane (MAO), by using a dual functional catalytic system containing late transition metal oligomerization catalyst and metal-locene copolymerization catalyst. The obtained long-branched polyethylene has the characteristics of low melting point, high activity and well-dispersed sequence distribution.

关 键 词：long-branched polyethylene in SITU polymerization late transition metal CATALYST METALLOCENE catalyst. 

分 类 号：TQ325[化学工程—合成树脂塑料工业]