高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (9): 1759.

• 研究论文 • 上一篇    下一篇

基于RAFT过程的MMA可控自由基聚合及嵌段共聚物的合成

潘景云, 何军坡, 姜洪进, 刘洋, 杨玉良   

  1. 复旦大学高分子科学系, 聚合物分子工程教育部重点实验室, 上海200433
  • 收稿日期:2003-05-09 出版日期:2004-09-24 发布日期:2004-09-24
  • 基金资助:

    国家重点基础研究专项经费(批准号:G19990648);国家自然科学基金(批准号:20004001)资助

Controlled Radical Homopolymerization and Block Copolymerization of Methyl Methacrylate Based on RAFT Process

PAN Jing-Yun, HE Jun-Po, JIANG Hong-Jin, LIU Yang, YANG Yu-Liang   

  1. The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
  • Received:2003-05-09 Online:2004-09-24 Published:2004-09-24

PDF (PC)

被引次数

15

摘要： 用二硫代酯调控的可逆加成-裂解链转移过程(RAFT)研究了MMA的聚合动力学及分子量分布,分析了引发剂浓度和二硫代酯浓度对反应速度及可控性的影响.用RAFT方法合成了嵌段共聚物PMMA-b-PS及带有自旋标记的嵌段共聚物PMMA-b-PS.

关键词: 活性自由基聚合, RAFT可逆加成-裂解链转移体系, 动力学, 嵌段共聚物, 自旋标记

Abstract: Methyl methacrylate(MMA) was polymerized by the controlled radical polymerization based on reversible addition-fragmentation chain transfer(RAFT) process. The effects of initiator and dithioester concentrations on polymerization rate and polydispersity of the resulted polymers were investigated. A larger initiator concentration increases the polymerization rate but has little influence on the molecular weight which is mainly determined by the concentration of dithoiester. PMMA-block-polystyrene(PMMA-b-PS) and PMMA-block-poly(styrene-co-4-chloromethylstyrene) were synthesized by means of macroinitiator technique, with the latter being spin-labeled by polymer reaction with 4-hydroxy-2,2,6,6-tetramethylpiperidinyl-1-oxy.

Key words: Controlled free radical polymerization, Reverse addition-fragment chain transfer(RAFT) system, Kinetics, Block copolymer, Spin label

中图分类号: 

TrendMD: