高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (11): 1875.

• 论文 • 上一篇    下一篇

等规聚苯乙烯与聚(乙烯/丙烯)嵌段共聚物的研究(Ⅰ)──一步法嵌段共聚合反应

陈天红, 林尚安   

  1. 中山大学高分子研究所, 广州 510275
  • 收稿日期:1996-08-08 出版日期:1997-11-24 发布日期:1997-11-24
  • 通讯作者: 陈天红, 女, 29岁, 博士, 现在南开大学高分子研究所做博士后工作
  • 作者简介:陈天红, 女, 29岁, 博士, 现在南开大学高分子研究所做博士后工作
  • 基金资助:

    国家自然科学基金;广东省自然科学基金

Studies on Block Copolymers of Isotactic Polystyrene and Poly(ethene-co-propene)(Ⅰ)──Synthesis of iPS-b-Poly(E-co-P) Block Copolymer

CHEN Tian-Hong, LIN Shang-An   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou 510275
  • Received:1996-08-08 Online:1997-11-24 Published:1997-11-24

摘要: 用自制的稀土化合物改性的高效钛系载体催化剂(SN-1),以顺序加料一步法进行苯乙烯与乙烯/丙烯混合单体的嵌段共聚合反应.通过实验找出典型的共聚合条件为:甲苯为溶剂;催化剂浓度为1.5~1.6mmol/L;铝钛摩尔比为20;聚合温度65℃.先使苯乙烯预聚一定时间,然后连续通入乙丙混合气体.共聚合产物中iPS链段的含量随苯乙烯单体预聚合时间的延长而增加.

关键词: 等规聚苯乙烯, 嵌段共聚合, 聚(乙烯/丙烯), Ziegler-Natta催化剂

Abstract: Sequential copolymerization of styrene with mixture of ethene and propene [iPS-b-Poly (E-co-P)] was carried out with NdClx (OR)y modified Ziegler-Natta Catalystdeveloped in our laboratory.The influence of concentration of catalyst and cocatalyst [Al(i-Bu)3], polymerization temperature, isospecific prepolymerization time of styrene and feedratio of ethene/propene on the copolymerizations was investigated in great details.Thecontent of lPSsegment in copolymerization product increases with the increasing time of styreneprepolymerization.

Key words: Isotactic polystyrene, Poly(ethene-co-propene), Block copolymerization, Ziegler-Natta catalyst

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