| 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 |
| |
| 引用本文： | 杜定准,汪月生.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[J].波谱学杂志,1992,9(2):121-129. |
| |
| 作者姓名： | 杜定准 汪月生 |
| |
| 作者单位： | 中国科技大学材料科学与工程系, 合肥 230026 |
| |
| 基金项目： | 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 |
| |
| 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 |
| 收稿时间： | 1990-10-23 |
STUDY ON COPOLYMERIZATION MECHANISM AND MOLECULAR CHAIN STRUCTURE OF COPOLYMERS OF β-CYCLODEXTRIN WITH EPICHLOROHYDRIN BY 1H NMR |
| |
| Du Dingzhun,Wang Yuesheng,Xu Wenying.STUDY ON COPOLYMERIZATION MECHANISM AND MOLECULAR CHAIN STRUCTURE OF COPOLYMERS OF β-CYCLODEXTRIN WITH EPICHLOROHYDRIN BY 1H NMR[J].Chinese Journal of Magnetic Resonance,1992,9(2):121-129. |
| |
| Authors: | Du Dingzhun Wang Yuesheng Xu Wenying |
| |
| Institution: | Department of Material Science and Engineering, China University of Science and Technology, Hefei 230026 |
| |
| 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. |
| |
| Keywords: | Copolymers of β-Cyclodextrin with Epichlorohydrin 1H NMR Molecular chain structure |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《波谱学杂志》浏览原始摘要信息 |
| 点击此处可从《波谱学杂志》下载免费的PDF全文 |
