中华医学超声杂志

应用化学 ›› 1997, Vol. 0 ›› Issue (5): 23-27.

• 研究论文 • 上一篇    下一篇

基团转移嵌段共聚研究

戴李宗, 邹友思, 姚青青, 潘容华   

  1. 厦门大学化学系, 厦门 361005
  • 收稿日期:1996-12-04 修回日期:1997-07-03 出版日期:1997-10-10 发布日期:1997-10-10
  • 基金资助:
    国家自然科学基金

Study on Group Transfer Block Copolymerization

Dai Lizong, Zou Yousi, Yao Qingqing, Pan Ronghua   

  1. Department of Chemistry, Xiamen University, Xiamen 361005
  • Received:1996-12-04 Revised:1997-07-03 Published:1997-10-10 Online:1997-10-10

PDF

366

被引次数

2 | 1

摘要： 本文采用双官能团引发剂和负离子型催化剂进行了甲基丙烯酸甲酯和甲基丙烯酸C7～9酯的基团转移嵌段共聚。讨论了温度、单体投料方式、引发剂-催化剂浓度比及单体浓度对聚合反应的影响,认为当两段反应温度分别为85℃和25℃时,引发剂浓度[I]=1.35×10-2mol/L,催化剂引发剂浓度比[Cat]/[I]=0.126,以活性较低的C7～9MA为第一嵌段单体,有利于C7～9MA和MMA的嵌段共聚。测定了嵌段共聚物的热形变温度;用GPC对嵌段共聚物的相对分子质量及分布进行了表征,结合IR、1HNMR和热形变温度分析,证明所得到的为PMMA-PC7～9MA-PMMA均相三嵌段共聚物。

关键词: 基团转移聚合, 嵌段共聚物, 甲基丙烯酸酯

Abstract: The group transfer block copolymerization of methyl methacrylate(MMA)and C7～9 methacrylate(C7～9 MA)has been studied by using a bifunctional initiator and an anionic catalyst. The influences of temperature、 monomer sequence、 concentration ratio of initiator to catalyst and concentration of monomers have been investigated. When T1=85℃, T2=25℃, [I]=1.35×10-2 mol/L, [Cat]/[I]=0.126, C7～9 MA as first monomer, the block copolymerization of C7～9 MA and MMA appeared to be predominate. The thermal deformation temperatures of the copolymers obtained are reported. The triblock copolymer(PMMA PC7～9 MA PMMA)has been characteriaced by FT IR, 1H NMR, and GPC as a homogeneous phase system.

Key words: group transfer polymerization, block copolymerization, methacrylate

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