首页 | 本学科首页   官方微博 | 高级检索  
     


Atom transfer radical polymerization of styrene initiated by bromoacetylated syndiotactic polystyrene macroinitiator
Authors:Yong Gao  Huaming Li  Xiayu Wang
Affiliation:1. Institute of Polymer Science, Chemistry College, Xiangtan University, Xiangtan 411105, Hunan Province, PR China;2. Institute of Polymer Science, Chemistry College, Xiangtan University, Xiangtan 411105, Hunan Province, PR ChinaInstitute of Polymer Science, Chemistry College, Xiangtan University, Xiangtan 411105, Hunan Province, PR China
Abstract:Atom transfer radical polymerization of styrene was conducted with bromoacetylated syndiotactic polystyrene as macroinitiator and copper bromide combined with N,N,N′,N′,N′‐pentamethyldiethylenetriamine as catalyst. A two‐stage process has been developed to synthesize the macroinitiator. First, syndiotactic polystyrene (sPS) was functionalized in the side phenyl rings with acetyl groups using the Friedel–Crafts reaction; second, the acetyl groups were converted to bromoacetyl groups by an acid‐catalyzed halogenation reaction. The initiator was found to be active in the polymerization of styrene, leading to the production of graft chains with well‐defined structure. The molecular weight and molecular weight distribution of the graft chains were determined using gel permeation chromatography after cleaving from the sPS backbone using peroxide acid oxidation followed by hydrazine‐catalyzed hydrolysis. The results indicated that the polymerization process was characteristic of a ‘living’ nature. Copyright © 2007 Society of Chemical Industry
Keywords:syndiotactic polystyrene  graft  atom transfer radical polymerization (ATRP)  oxidation  hydrolysis
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号