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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (20): 1861-1865. 上一篇    下一篇

研究论文

通过自缩合乙烯基氧阴离子聚合制备超支化聚甲基丙烯酸羟丙酯

贾志峰，陈皞，颜德岳*   

  1. (上海交通大学化学化工学院 上海 200240)
  • 投稿日期:2005-03-15 修回日期:2005-06-24 发布日期:2010-12-10
  • 通讯作者: 颜德岳

Synthesis of Hyperbranched Poly(2-hydroxypropyl methacrylate) by Self-condensing Vinyl Oxyanionic Polymerization

JIA Zhi-Feng, CHEN Hao, YAN De-Yue*   

  1. (School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240)
  • Received:2005-03-15 Revised:2005-06-24 Published:2010-12-10
  • Contact: YAN De-Yue

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2467

被引次数

31

由甲基丙烯酸羟丙酯通过自缩合乙烯基氧阴离子聚合(self-condensing vinyl oxyanionic polymerization)制备了端羟基的超支化聚甲基丙烯酸酯. 以氢化钾(KH)和冠醚的复合物为引发剂时, 可以得到高分子量的聚合物. 用1H NMR和13C NMR谱图证实了聚合物的超支化结构. 由于在聚合过程中存在质子转移反应, 引发剂与单体的摩尔比会影响所得聚合物的结构. 超支化聚合物的玻璃化转变温度在58.1～81.4 ℃之间, 且随着引发剂与单体的比例的减小而降低. 当引发剂与单体等摩尔比时, 所得聚合物的支化度为0.49.

关键词: 超支化聚合物, 自缩合乙烯基聚合, 甲基丙烯酸-2-羟丙酯, 氧阴离子聚合

Hyperbranched polymethacrylates with hydroxyl end groups were prepared by means of self-condensing vinyl oxyanionic polymerization of commercially available monomer 2-hydroxypropyl methacrylate. The hyperbranched polymers with high molecular weight were obtained with the complex of potassium hydride and 18-crown-6 as the initiator. The molecular structure of the hyperbranched polymers was confirmed with 1H and 13C NMR spectra. The amount of initiator used in the polymerization could affect the structure of polymer based on a proton-transfer process. The glass transition temperature of the prepared polymers ranged from 58.1 to 81.4 ℃, and decreased with decreasing the initiator to monomer ratio. When the ratio of initiator to monomer equaled 1, the degree of branching of the resulting polymer was calculated to be 0.49.

Key words: hyperbranched polymer, self-condensing vinyl polymerization, 2-hydroxypropyl methacrylate, oxyanionic polymerization