CIESC Journal

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稀土催化苯乙烯本体聚合机理与动力学

吴林波; 李伯耿; 李宝芳; 曹堃   

  1. Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
    China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2001-12-28 发布日期:2001-12-28
  • 通讯作者: 吴林波

Kinetics and Mechanism of Bulk Polymerization of Styrene Catalyzed by Rare Earth Catalyst

WU Linbo; LI Bogeng; LI Baofang; CAO Kun   

  1. Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
    China
  • Received:1900-01-01 Revised:1900-01-01 Online:2001-12-28 Published:2001-12-28
  • Contact: WU Linbo

摘要: The bulk polymerization of styrene catalyzed by Nd(P204)3/MgBu2/HMPA (hexamethyl phospho-
ramide) was carried out in capped glass tubes. The effects of reaction conditions on
polymerization conversion and molecular weight in the range of high conversion were
investigated. The molecular weight of the resultant polymers is dramatically high and its
distribution is relatively narrow. The polymerization process demonstrates the feature of
living polymerization and auto-acceleration phenomenon. The auto-acceleration phenomenon is
attributed to the non-instantaneous formation of the active species. The experimental data
suggest that chain transfer to MgBu2 is one of the factors governing the molecular weight
development. A mechanism of polymerization is presented with the chain transfer process
incorporated.

关键词: 稀土催化剂;苯乙烯;本体聚合;聚合机理;动力学;聚苯乙烯

Abstract: The bulk polymerization of styrene catalyzed by Nd(P204)3/MgBu2/HMPA (hexamethyl phospho-
ramide) was carried out in capped glass tubes. The effects of reaction conditions on
polymerization conversion and molecular weight in the range of high conversion were
investigated. The molecular weight of the resultant polymers is dramatically high and its
distribution is relatively narrow. The polymerization process demonstrates the feature of
living polymerization and auto-acceleration phenomenon. The auto-acceleration phenomenon is
attributed to the non-instantaneous formation of the active species. The experimental data
suggest that chain transfer to MgBu2 is one of the factors governing the molecular weight
development. A mechanism of polymerization is presented with the chain transfer process
incorporated.

Key words: styrene, polymerization, rare earth catalyst, kinetics, mechanism