高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (9): 1777.

• 研究简报 • 上一篇    下一篇

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

李利东, 王齐, 范志强   

  1. 浙江大学高分子科学系, 杭州310027
  • 收稿日期:2003-07-01 出版日期:2004-09-24 发布日期:2004-09-24
  • 基金资助:

    科技部国家重点基础研究项目(批准号:G1999064801)资助

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

LI Li-Dong, WANG Qi, FAN Zhi-Qiang   

  1. Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2003-07-01 Online:2004-09-24 Published:2004-09-24

关键词: 双峰分子量分布, 聚乙烯, 铝氧烷, 铁催化剂

Abstract: 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 {[ArN=C(Me)]2C5H3N}FeCl2(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.

Key words: Bimodal molecular weight distribution, Polyethylene, Aluminoxane, Iron-based catalyst

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