ICAR ATRP OF ACRYLONITRILE UTILIZING A MODERATE TEMPERATURE RADICAL INITIATOR  

作　　者：Fei-jun Zhang 刘晓辉 

机构地区：[1]School of Materials Science and Engineering,Key Lab of Hollow Fiber Membrane Material and Processes of Ministry of Education,Tianjin Polytechnic University

出　　处：《Chinese Journal of Polymer Science》2013年第12期1613-1622,共10页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21074127 and 20804044);the Key Project of Chinese Ministry of Education(No.212003)

摘　　要：Initiators for continuous activator regeneration atom transfer radical polymerization （ICAR ATRP） of acrylonitrile was first conducted at various ambient temperatures （30-45 ℃）. 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 wa.s 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.Initiators for continuous activator regeneration atom transfer radical polymerization （ICAR ATRP） of acrylonitrile was first conducted at various ambient temperatures （30-45 ℃）. 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 wa.s 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.

关 键 词：Living polymerization ICAR ATRP ACRYLONITRILE Ambient temperature. 

分 类 号：O631.3[理学—高分子化学]