Micellization Behavior of an Amphiphilic Statistical Copolymer in Water-Methanol Mixtures

被引：4
作者：
Mori, Takuya [1 ]
Hashidzume, Akihito [1 ]
Sato, Takahiro [1 ]
机构：
[1] Osaka Univ, Dept Macromol Sci, Toyonaka, Osaka 5600043, Japan
来源：
POLYMER JOURNAL | 2009年 / 41卷 / 03期
关键词：
Micelle; Amphiphilic Polymer; Statistical Copolymer; Sedimentation Equilibrium; Dynamic Light Scattering; FRAGMENTATION CHAIN-TRANSFER; LIGHT-SCATTERING; AQUEOUS-SOLUTION; POLYMER; POLYELECTROLYTE; ASSOCIATION; MEDIA; RAFT;
D O I：
10.1295/polymj.PJ2008223
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Sedimentation equilibrium measurements were made on an amphiphilic statistical copolymer p(AMPS/C6) made of sodium 2-(acrylamido)-2-methylpropane-sulfonate (AMPS) and n-hexyl methacrylate (C6), dissolved in water-methanol mixtures with 0.2 M LiClO4 and different methanol contents over a wide polymer concentration range. The experimental results were analyzed in terms of a micellar Solution theory for amphiphilic polyelectrolytes to estimate the aggregation number m of the micelle and the internal free energy change Delta(m)/m (per polymer chain) due to micellization. Both m and Delta(m)/m decreased with increasing the methanol content in the solvent. In addition, dynamic light scattering for the same copolymer system indicated that p(AMPS/C6) formed a uni-core star-like micelle in water-methanol mixture with the methanol mole fractions of 0 and 0.06.
引用
收藏
页码：189 / 194
页数：6
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