波谱学杂志 ›› 1992, Vol. 9 ›› Issue (2): 121-129.

• 研究论文 • 上一篇    下一篇

1H NMR研究β-环糊精与环氧氯丙烷共聚物的反应机理和分子链结构

杜定准, 汪月生, 徐文英   

  1. 中国科技大学材料科学与工程系, 合肥 230026
  • 收稿日期:1990-10-23 修回日期:1991-10-20 出版日期:1992-06-05 发布日期:2018-01-20
  • 基金资助:
    中国科学院武汉物理研究所波谱与原子分子物理国家重点实验室资助课题

STUDY ON COPOLYMERIZATION MECHANISM AND MOLECULAR CHAIN STRUCTURE OF COPOLYMERS OF β-CYCLODEXTRIN WITH EPICHLOROHYDRIN BY 1H NMR

Du Dingzhun, Wang Yuesheng, Xu Wenying   

  1. Department of Material Science and Engineering, China University of Science and Technology, Hefei 230026
  • Received:1990-10-23 Revised:1991-10-20 Online:1992-06-05 Published:2018-01-20

摘要: β-环糊精(cyclodcxtrin)与环氧氯丙烷(Epichlorohydrin)一个系列的共聚物获得,1H NMR以D2O或DMSO-d6为溶剂的测定,其谱峰被归属.共聚合反应机理为以羟基和环氧基为活性中心的亲核取代.当环氧氯丙烷:β-环糊精=n ≤ 3时,聚合物分子链呈现以β-环糊精母体为中心的线状或低枝化状链结构;当n ≥ 5时,分子链出现交联网络结构.n越大(n ≤ 12),分子量越急剧增加,其交联度也越大.

关键词: β-环糊精与环氧氯丙烷共聚物, 1H NMR, 分子链结构

Abstract: A series of copolymcrs of β-Cyclodextrin (β-CD) with Epichlorohydrin (EP) was determined by means of 1H NMR in D2O or DMSO-d6 at 60,300 and 400 MHz, and their spectral assignments were given out. Copolymerization mechanism could be ascribed to a nucleophilic addition of hydroxyl group to epoxy group as an active centre. When EP:β-CD=n ≤ 3,the copolymeric molecular chains showed linear or branched structure at β-CD matrix; n ≥ 5, crosslinking network appeared in the chains. The larger n value (here, n ≤ 12), the larger M. W., and the higher crosslinking degree.

Key words: Copolymers of β-Cyclodextrin with Epichlorohydrin, 1H NMR, Molecular chain structure