高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (10): 2067.doi: 10.7503/cjcu20150377

• 高分子化学 • 上一篇    下一篇

丙烯酰胺多面体低聚倍半硅氧烷在超临界CO2中的RAFT聚合

程龙, 边仲轩, 丁敏源, 赵萌, 李慧()   

  1. 华东理工大学材料科学与工程学院, 上海 200237
  • 收稿日期:2015-05-11 出版日期:2015-10-10 发布日期:2015-09-06
  • 作者简介:联系人简介: 李 慧, 女, 博士, 教授, 主要从事聚合方法等研究. E-mail:lihui@ecust.edu.cn
  • 基金资助:
    国家科技部国际合作项目(批准号: 2010DFB70470)资助

RAFT Polymerization of Acrylamide Polyhedral Oligometic Silsesquioxane in Supercritical CO2+

CHENG Long, BIAN Zhongxuan, DING Minyuan, ZHAO Meng, LI Hui*()   

  1. School of Materials Science and Engineering,East China University of Science and Technology, Shanghai 200237, China
  • Received:2015-05-11 Online:2015-10-10 Published:2015-09-06
  • Contact: LI Hui E-mail:lihui@ecust.edu.cn

摘要:

以超临界CO2为聚合介质, 硫代苯甲酰基特丁基硫酯(TTBT)为链转移剂, 通过可逆加成-断裂链转移(RAFT)聚合制备了聚丙烯酰胺多面体低聚倍半硅氧烷(PAMPOSS)均聚物及其与甲基丙烯酸甲酯(PMMA)的嵌段共聚物(PAMPOSS-b-PMMA). 对产物结构组成和分子量及其分布进行表征. 结果表明, 在TTBT的控制下, POSS的均聚物和嵌段共聚物具有高分子量及窄分子量分布. 含POSS单体在超临界CO2中为均相聚合, POSS聚合物的结晶性在一定程度上影响其在超临界CO2中溶解性.

关键词: 超临界CO2, 低聚倍半硅氧烷(POSS), 硫代苯甲酰基特丁基硫酯(TTBT), 可逆加成-断裂转移(RAFT)聚合

Abstract:

Polyacrylamide(PAM) isobutyl-polyhedral oligometic silsesquioxane(POSS)(PAMPOSS) homopolymer and PAMPOSS-b-PMMA(polymethyl methacrylate) block copolymers were prepared via reversible addition-fragmentation transfer(RAFT) polymerization using benzenecarbodithioic acid 1,1-dimethylethyl ester as the RAFT agent in supercritical CO2. The products were characterized. The results show that polymerization reaction in supercritical CO2 is well controlleded. Both of PAMPOSS and PAMPOSS-b-PMMA have high degree of polymerization(DP) and low polydispersity index(PDI). It can be also found that the polymerization of AM-POSS is a homogeneous reaction, and the solubility of POSS containing polymers in supercritical CO2 is effected by the crystallinity of POSS.

Key words: Supercritical CO2, Polyhedral oligometic silsesquioxane(POSS), Benzenecarbodithioic acid 1, 1-dimethylethyl ester(TTBT), Reversible addition fragmentation transfer(RAFT) polymerization

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