Izzo D, Marques C M
Instituto de Física, U.F.R.J., Caixa Postal 68528, 21945-970, Rio de Janeiro, Brazil.
J Phys Chem B. 2005 Apr 7;109(13):6140-5. doi: 10.1021/jp050196v.
We study theoretically mixed solutions of homopolymer and diblock copolymer chains. The solvent is a poor solvent for the homopolymers and a selective solvent for the copolymers. We find that the formation of copolymer micelles containing also the insoluble chains allows for an increased solubility of the homopolymers in the solution. In agreement with experiments, we find also that the solubilization power of the micelles, that is, the maximum amount of total homopolymer weight solubilized per unit weight of copolymers in solution, decreases strongly with the homopolymer index of polymerization.
我们从理论上研究了均聚物和二嵌段共聚物链的混合溶液。该溶剂对均聚物而言是不良溶剂，对共聚物而言是选择性溶剂。我们发现，含有不溶性链的共聚物胶束的形成使得均聚物在溶液中的溶解度增加。与实验结果一致，我们还发现胶束的增溶能力，即溶液中每单位重量共聚物所能溶解的均聚物总重量的最大量，会随着均聚物的聚合指数而急剧下降。
