ICAR ATRP of acrylonitrile utilizing a moderate temperature radical initiator

被引:0
|
作者
Fei-jun Zhang
Xiao-hui Liu
机构
[1] Tianjin Polytechnic University,School of Materials Science and Engineering, Key Lab of Hollow Fiber Membrane Material and Processes of Ministry of Education
来源
Chinese Journal of Polymer Science | 2013年 / 31卷
关键词
Living polymerization; ICAR ATRP; Acrylonitrile; Ambient temperature;
D O I
暂无
中图分类号
学科分类号
摘要
Initiators for continuous activator regeneration atom transfer radical polymerization (ICAR ATRP) of acrylonitrile was first conducted at various ambient temperatures (30–45 °C). The key to success is ascribed to the usage of an appropriate low temperature radical initiator (2,2′-azobis(2,4-dimethylvaleronitrile)) and a high reactivity catalytic system (CuBr2/Me6TREN). The molar ratio of Cu catalyst to AN as low as 1:20000 was used to prepare well-defined polyacrylonitrile with controlled molecular weight and a narrow polydispersity index range of 1.08–1.30, while the monomer conversion was up to ca. 98%. The apparent activation energy of the polymerization was calculated to be 128.45 kJ/mol, suggesting that the polymerization strongly depended on reaction temperature. The very high chain-end functionality of the resultant polymer was confirmed by 1H-NMR and GPC analyses as well as chain extension reaction.
引用
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页码:1613 / 1622
页数:9
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