高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (10): 1460.

• 研究论文 • 上一篇    下一篇

Cl2/TiCl4体系引发IBVE活性阳离子聚合的研究(Ⅰ)——引发活性中心及其络合竞争

郭文莉, 徐瑞清, 武冠英   

  1. 北京化工学院高分子材料研究所, 北京 100029
  • 收稿日期:1992-11-17 修回日期:1993-04-24 出版日期:1993-10-24 发布日期:1993-10-24
  • 通讯作者: 郭文莉. 女, 30岁, 硕士, 讲师, 现在北京石油化工学院.
  • 作者简介:郭文莉. 女, 30岁, 硕士, 讲师, 现在北京石油化工学院.
  • 基金资助:

    国家自然科学基金

Cationic Polymerization of IBVE Initiated by Cl2 TiCl4/Toluene (Ⅰ)—Initiating Centers and the Role of Their Complex Competition in the Polymerization

GUO Wen-Li, XU Rui-Qing, WU Guan-Ying   

  1. Institute of Polymer Science, Beijing Institute of Chemical Technology, Beijing, 100029
  • Received:1992-11-17 Revised:1993-04-24 Online:1993-10-24 Published:1993-10-24

PDF (PC)

摘要： 采用UV光谱法证明了IBVE/Cl2/TiCl1/甲苯聚合体系中同时存在着两种引发活性中心及络合竞争,研究了Cl2/TiCl1和H2O/TiCl1络合平衡,求出了20℃时2TiCl1←Cl2和TiCl1←H2O络合平衡不稳定常数.

关键词: Cl2/TiCl4引发体系, 异丁基乙烯基醚(IBVE), 活性聚合, 阳离子聚合, 紫外光谱

Abstract: There coexist at least two initiating centers.The monomodal trace of the polymer in GPCwas observed when only one active center outlives after complexing competition.In the given system IBVE/Cl2/TiCl4/toluene the complexing competition is between Cl2/TiCl4 and H2O/ TiCl4 where in the trace of water existed as residual impurity being not thoroughly removed by usual purification technique.The unstable equilibrium constants for complexation reaction of Cl2/TiCl4 and H2O/TiCl4 were determined for them as 1.9×10-10 and 8.31×10-6 respectively.The huge difference between their unstable equilibrium constants shows active complex Cl2/TiCl4 is predominate, then “living” characterastic of the polymerization is outstanding.

Key words: Cl2/TiCl4 initiating system, IBVE, Living polymerization, Cationic polymerization, UV spectroscope

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