串联催化剂合成线性低密度聚乙烯的进展  

Advance in preparation of linear low density polyethylene by tandem catalysis system

作　　者：张军伟[1,2] 代金松 李华姝 李伯耿[2] 

机构地区：[1]北京利和知信科技有限公司,北京100050 [2]浙江大学化学工程联合国家重点实验室,浙江杭州310027

出　　处：《化工进展》2014年第2期387-394,399,共9页Chemical Industry and Engineering Progress

摘　　要：用串联催化剂体系(tandem catalysis system)合成线性低密度聚乙烯是近十余年来聚烯烃催化剂领域研究的热点之一。本文按照齐聚催化剂选择性的不同和共聚催化剂的不同分为低选择性体系、高选择性体系、长支链体系、负载型催化剂体系和双功能体系等5类催化剂体系,系统综述了串联催化剂体系原位合成线性低密度聚乙烯的研究开发工作,着重阐述了不同选择性的齐聚催化剂与不同共聚能力的共聚催化剂的配伍在不同的反应条件下对聚合物性能、结构的影响以及不同串联催化剂体系的反应特点和优缺点。Preparation of linear low density polyethylene （LLDPE） by tandem action of an oligomerization catalyst and a copolymerization catalyst is one of the most popular areas in polyolefin catalyst research. Advance in the tandem catalysis system is reviewed. Five kinds of tandem catalysis systems are discussed,namely,low selectivity system,high selectivity system,long branched system, supported metallocene catalyst system,and dual functional system considering the selectivity of oligomerization catalyst and difference in the copolymerization catalysts used. The selectivity of oligomerization catalysts and compatibility of copolymerization catalysts with different abilities played an important role in the polymerization with respect to polymer structure and properties under various reaction conditions. The features of different systems are also discussed.

关 键 词：串联催化剂体系 催化剂 茂金属 乙烯齐聚 聚合 线性低密度聚乙烯 反应动力学 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]