摘要
Considering the inhomogeneity of the concentration distribution in the corona of a star\|shaped micelle, an equation system of free energy components was suggested in order to predict the micro\|phase separation of the diblock copolymer in selective solvents. All energetic and entropic contributions to the free energy of micellization were included in equations for the micellar solution, which was composed of the di\|block copolymers with certain molecular weights and the solvent with special characters at a giving temperature. The minimization of free energy produced the equilibrium size and aggregation number of the micelle. The corona and core size of the micelle,the concentration profile of the soluble block in corona and the value of the aggregation number were obtained based on the present theory. Moreover, the theoretical predictions of the aggregation number were in good agreement with the experimental data for systems of polystyrene\|poly(2\|cinnamoylethyl methacrylate)/cyclopentane and poly(4\|vinylpyridine) \|polystyrene/toluene.
Considering the inhomogeneity of the concentration distribution in the corona of a star\|shaped micelle, an equation system of free energy components was suggested in order to predict the micro\|phase separation of the diblock copolymer in selective solvents. All energetic and entropic contributions to the free energy of micellization were included in equations for the micellar solution, which was composed of the di\|block copolymers with certain molecular weights and the solvent with special characters at a giving temperature. The minimization of free energy produced the equilibrium size and aggregation number of the micelle. The corona and core size of the micelle,the concentration profile of the soluble block in corona and the value of the aggregation number were obtained based on the present theory. Moreover, the theoretical predictions of the aggregation number were in good agreement with the experimental data for systems of polystyrene\|poly(2\|cinnamoylethyl methacrylate)/cyclopentane and poly(4\|vinylpyridine) \|polystyrene/toluene.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2000年第3期382-385,共4页
Acta Polymerica Sinica
基金
教育部高等学校博士点专项科研基金
关键词
二嵌段共聚物
星形胶束
聚集数
选择性溶剂
Di-block copolymer, Star-shaped micelle, Micro-phase separation, Aggregation number
