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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2006,Vol.22>> Issue(04)>> 496-501     doi: 10.3866/PKU.WHXB20060421         中文摘要
Effect of Micellization Behavior of Surface Active Monomer NaAMC14S on Copolymerization Process
YU Ya-Ming;WANG Zhong-Hua;GAO Bao-Jiao;WANG Rui-Xin
Department of Chemical Engineering, North University of China, Taiyuan 030051, P. R. China; Drilling Engineering Technology Institute, ZPEB, Puyang 457001, P. R. China
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The Krafft point and the critical micelle concentrations (cmc) at different temperatures for the surface active monomer, sodium 2-acrylamido-tetradecane (NaAMC14S), were determined. The copolymerizations of NaAMC14S and acrylamide (AM) were carried out in aqueous solution at above and below cmc of NaAMC14S, respectively. The compositions of the copolymers were characterized via conductometric titration method, the thermal behaviors of the copolymers were measured by DSC, and the properties of hydrophobic association of the copolymers were determined by using fluorescence probe technique. By the above investigations, the copolymerization mechanism was explored emphatically. The experiment results show that there are two kinds of copolymerization mechanisms depending on the concentrations of NaAMC14S. When the copolymerization of NaAMC14S and AM is performed above the critical micelle concentration of NaAMC14S, the copolymerization process keeps being a micro-block copolymerization mechanism, and a large compositional drift occurs during the copolymerization. Whereas when the copolymerization of NaAMC14S and AM is performed below the critical micelle concentration of NaAMC14S, the polymerization process is carried out in agreement with random copolymerization mechanism, and the variation of the copolymer composition with the conversion is slower. The DSC thermograms of the copolymers and the result determined by fluorescence probe technique confirm the above mechanisms.

Keywords: Surfmer   Micellization behavior   Critical micelle concentration   Copolymerization mechanism   Acrylamide  
Received: 2005-09-23 Accepted: 2005-10-31 Publication Date (Web): 2006-04-10
Corresponding Authors: GAO, Bao-Jiao Email: gaobaojiao@126.com


Cite this article: YU Ya-Ming;WANG Zhong-Hua;GAO Bao-Jiao;WANG Rui-Xin. Effect of Micellization Behavior of Surface Active Monomer NaAMC14S on Copolymerization Process[J]. Acta Phys. -Chim. Sin., 2006,22 (04): 496-501.    doi: 10.3866/PKU.WHXB20060421
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