Synthesis and Substituent Effects of Ansa rac-MeSi(2-Me-4-Ph-Ind)ZrCl_(2) Derivatives on Olefin Polymerization  

作　　者：Jia Yusen Wang Kefeng Lei Junyu Lin Long Long Huijuan Hao Haijun 

机构地区：[1]College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,P.R.China [2]Petrochemical Research Institute,PetroChina Company Limited,Beijing 100195,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2024年第4期29-38,共10页中国炼油与石油化工(英文版)

摘　　要：Ansa rac-MeSi(2-Me-4-Ar-Ind)ZrCl_(2)(Ar=Ph,Ind=indenyl,7a)is an industrial metallocene catalyst commonly used for propylene polymerization.This study investigated the effects of substituents at the para position of the Ar group on catalyst performance.Four derivatives of 7b(p-MePh),7c(p-OMe),7d(p-tBuPh),7e(p-F-Ph)were successfully synthesized through three methods.The influence of these substitutions on catalyst activity was evaluated in 1-hexene polymerization with 7a-e in toluene using solid methylaluminoxane as a co-catalyst.Derivative 7c exhibited the highest catalytic activity and stereoselectivity,achieving an isotacticity of 94%,indicating that electron-donating substituent enhancing catalytic reactivity.

关 键 词：zirconocene catalysts 1-HEXENE POLYMERIZATION substituent effect 

分 类 号：TQ426[化学工程] TQ325.1