高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (8): 1541.

• 研究论文 • 上一篇    下一篇

NaNO2/FeSO4存在下聚苯乙烯大分子引发剂的合成及嵌段共聚

许淼清1, 黄剑莹2, 颜明发2, 林明华2, 林强2, 陈一虹2, 邹友思2   

  1. 1. 福建省泉州师范学院化学系, 泉州362000;
    2. 厦门大学材料科学与工程系, 厦门361005
  • 收稿日期:2004-10-20 出版日期:2005-08-10 发布日期:2005-08-10
  • 通讯作者: 邹友思(1954年出生),男,教授,主要从事高分子化学研究.E-mail:yszou@xmu.edu.cn E-mail:yszou@xmu.edu.cn
  • 基金资助:

    国家“八六三”计划项目(批准号:2001AA313070)资助.

Synthesis and Characterization of Macroinitiator Polystyrene and Block Copolymerization in the Presence of Sodium Nitrite and Iron(Ⅱ) Sulfate

XU Miao-Qing1, HUANG Jian-Ying2, YAN Ming-Fa2, LIN Ming-Hua2, LIN Qiang2, CHEN Yi-Hong2, ZOU You-Si2   

  1. 1. Department of Chemistry, Quanzhou Normal College, Quanzhou 362000, China;
    2. Department of Material Science and Engineering, Xiamen University, Xiamen 361005, China
  • Received:2004-10-20 Online:2005-08-10 Published:2005-08-10

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摘要： 用NaNO2/FeSO4·7H2O体系替代TEMPO在有机相中合成分子量可控的聚苯乙烯大分子引发剂,引发苯乙烯聚合及酯类单体[如甲基丙烯酸甲酯(MMA)、丙烯酸甲酯(MA)和丙烯酸乙酯(EA)等]聚合,得到两嵌段共聚物.其多分散性指数小于1.5,体现了可控聚合的特征.用大分子引发剂引发苯乙烯进行活性链增长,单体的转化率较高.嵌段共聚物的实测分子量与理论分子量相近,结构经1HNMR和GPC表征.NaNO2/FeSO4·7H2O体系在纯有机相中的应用降低了活性聚合的成本,有利于工业化应用.

关键词: 聚苯乙烯, 活性自由基聚合, 嵌段共聚物

Abstract: In the presence of sodium nitrite and iron(Ⅱ) sulfate the controlled polystyrenes with different molecular weight weres synthesized. The polystyrene macroinitiator could initiate the polymerization of methyl methacrylate(MMA), methyl acrylate(MA), ethyl acrylate(EA), and styrene(St). All the polymerizations have the characters of the living polymerization that the molecular weight of the copolymer gradually increased with conversion and the polydispersity indexes are below 1.5. In addition, block copolymer's experimental molecular weight is similar to theoretical molecular weight. The basic mechanism for the control of radical polymerization is thus a nitroxide-mediated process, such as TEMPO, and the price was reduced greatly, which is of benefits to the industries application. The block copolymerization formation was confirmed by 1HNMR and GPC measurements.

Key words: Polystyrene, Living free radical polymerization, Block copolymer

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