高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (9): 1494.

• 研究简报 • 上一篇    下一篇

5,6-苯并-2-亚甲基-1,3-二氧环庚烷的活性自由基开环聚合反应

袁金颖, 邹应芳, 潘才元   

  1. 中国科学技术大学高分子科学与工程系, 合肥 230026
  • 收稿日期:1999-08-02 出版日期:2000-09-24 发布日期:2000-09-24
  • 通讯作者: 潘才元(1940年出生),男,教授,博士生导师,主要从事开环聚合与活性聚合等研究.
  • 基金资助:

    国家自然科学基金(批准号:29774027)资助

Living Free Radical Ring-opening Polymerization of 5,6-Benzo-2-methylene-1,3-dioxepane

YUAN Jin-Ying, ZOU Ying-Fang, PAN Cai-Yuan    

  1. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  • Received:1999-08-02 Online:2000-09-24 Published:2000-09-24

关键词: 活性自由基聚合, 原子转移自由基聚合, 开环聚合

Abstract: In order to clarify whether Atom Transfer Radical Polymerization(ATRP) method could be extended to free radical ring-opening polymerization, the polymerization of a kind of unsaturated cyclic acetal: 5,6-benzo-2-methylene-1,3-dioxepane(BMDO) in the presence of α,α'-dibromoxylene as the initiator and CuBr/2,2'-bipyridine as the catalyst and ligand at 120 ℃ was investigated. IR, 1H NMRand 13C NMRspectra of the polymer obtained showed that BMDOunderwent quantitatively ring-opening polymerization and linear polyesters were prepared. GPCcurves indicated that the polyesters had a narrower molecular weight distribution. Molecular weight of the polyesters could be controlled by polymerization time and adjusting the molar ratio of monomer/intiator consumed. The polymers with narrower polydispersities were obtained, and first-order kinetics of polymerization was observed. These facts proved that BMDOunderwent “living” free radical ring-opening polymerization. And this is the firsr report on the “living” free radical ring-opening polymerization of unsarurated cyclic acetal using atom transfer radical polymerization method. The results of ln([M]0)/[M]) against polymerization time, Mn vs. conversion, and molecular weight distribution of the polymers are indicative of the “living” polymerization process.

Key words: Living free radical polymerization, Atom transfer radical polymerization, Ring-opening polymerization

中图分类号: 

TrendMD: