高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (3): 454.

• 论文 • 上一篇    下一篇

新型高活性催化剂乙烯气相聚合的研究(Ⅰ)──气相均聚和共聚反应及气相均聚动力学

王海华, 李乃新, 卢泽俭, 林尚安   

  1. 中山大学高分子研究所, 广州, 510275
  • 收稿日期:1993-07-08 修回日期:1993-10-23 出版日期:1994-03-24 发布日期:1994-03-24
  • 通讯作者: 王海华,53岁,教授.
  • 作者简介:王海华,53岁,教授.
  • 基金资助:

    国家自然科学基金

Studies on Gaseous Phase Polymerization of Ethylene with Highly Active Catalyst(Ⅰ)──The Gaseous Phase Homo-and Copolymerization as well as Kinetics of Gaseous Phase Polymerization of Ethylene

WANG Hai-Hua, LI Nai-Xin, LU Ze-Jian, LIN Shang-An   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275
  • Received:1993-07-08 Revised:1993-10-23 Online:1994-03-24 Published:1994-03-24

摘要: 研究了新型高活性乙烯气相聚合催化剂TiCl4/MgCl2/ZnCl2/SiCl4/醇/Al(i-Bu)3体系中钛和醇组分含量对聚合反应和产物颗粒形态的影响。测定了乙烯气相聚合反应动力学曲线,确定了聚合动力学方程。用SEM、DSC、WAXD、13CNMR对催化剂及聚合物的形态、结构和性能进行了分析和表征。

关键词: 乙烯气相聚合, 高活性催化剂, 共聚反应, 聚合动力学, TiCl4, 异丙醇

Abstract: The gaseous phase homo-and copolymerization of ethylene has been studied in the presence of TiCl4/MgCl2/ZnCl2/SiCl4/alcohol/Al(i-Bu )3 highly active catalyst which was prepared by comilling-reaction procedure.It was found that the catalytic efficiency and bulk density of PEdecreased with increase in content of titanium compound.The added i-C3H7OHraises the catalytic performance and improves the morphology as well as particle distribution of the PEwith a optimum dosage of i-C3H7OH/MgCl2=1.0-1.5.The kinetics of gaseous phase ethylene polymerization has been investigated.The polymerization rate equation in good agreement with experimental evidence is expressed as:vt-vs=(v0-vs)e-βt.The morphologies of the catalyst before and after prepolymerization as well as PE and LLDPE were examined by SEM.The structures and properties of the PEwith LLDPE were studied by WAXD,DSC and 13C NMR.

Key words: Gaseous phase polymerization of ethylene, Highly active catalyst, Copolymerization, Polymerization kinetics, TiCl4, i-C3H7OH

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