铁系后过渡金属催化剂/不同铝氧烷体系制备具有双峰分子量分布的聚乙烯  

Synthesis of Polyethylene with Bimodal Molecular Weight Distribution by Iron-based Late Transition Metal Catalyst/Various Aluminoxanes System

作　　者：李利东[1] 王齐[1] 范志强[1] 

机构地区：[1]浙江大学高分子科学系,杭州310027

出　　处：《高等学校化学学报》2004年第9期1777-1779,共3页Chemical Journal of Chinese Universities

基　　金：科技部国家重点基础研究项目 (批准号 :G19990 64 80 1)资助

摘　　要：A series of alkylaluminoxanes(TEAO, BTEAO, TAAO and BEBAO) were synthesized by hydrolysis of aluminium alkyls and modified with para-fluorophenylboric acid. Their cocatalytic performances, especially their effects on molecular weight and molecular weight distribution of polyethylene catalyzed by{ 2C 5H 3N}FeCl 2(Ar=2,6-diisopropylphenyl) (1) were studied. Under the action of iron-based catalyst together with all of the four alkylaluminoxanes linear high-density polyethylene with broad or bimodal molecular weight distribution was formed, and the molecular weight and molecular weight distribution of polyethylene could be adjusted to some extent by changing n(Al)/n(Fe) ratios and architecture of aluminoxanes.A series of alkylaluminoxanes(TEAO, BTEAO, TAAO and BEBAO) were synthesized by hydrolysis of aluminium alkyls and modified with para-fluorophenylboric acid. Their cocatalytic performances, especially their effects on molecular weight and molecular weight distribution of polyethylene catalyzed by{ 2C 5H 3N}FeCl 2(Ar=2,6-diisopropylphenyl) (1) were studied. Under the action of iron-based catalyst together with all of the four alkylaluminoxanes linear high-density polyethylene with broad or bimodal molecular weight distribution was formed, and the molecular weight and molecular weight distribution of polyethylene could be adjusted to some extent by changing n(Al)/n(Fe) ratios and architecture of aluminoxanes.

关 键 词：双峰分子量分布 聚乙烯 铝氧烷 铁催化剂 

分 类 号：O632[理学—高分子化学]