混合溶剂中高分子的尺寸  

Coil Dimensions of Polymer in Mixed Solvents

作　　者：朱平平[1] 任琳[1] 杨海洋[1] 刘远立[1] 

机构地区：[1]中国科学技术大学高分子科学与工程系,安徽合肥230026

出　　处：《功能高分子学报》2003年第2期261-268,共8页Journal of Functional Polymers

摘　　要：三元体系(高聚物/混合溶剂)性质不能简单地直接从相应的两种二元体系(高聚物/单一溶剂)性质来推演,混合溶剂中排除体积效应往往不是两种单一溶剂中排除体积效应的加权平均,高分子的尺寸除了与单一溶剂-高分子间的相互作用有关外,还受到两种溶剂间的相互作用、高分子的自缔合趋势的影响,在不同的θ溶剂中高分子的无扰尺寸往往不同,两种溶剂间的相互作用是重要的影响因素之一。The properties of the ternary system (polymer + mixed solvent) can not be deduced from those of two binary systems composed of the polymer and each single solvent. The excluded-volume behavior in the mixed solvent is not the average of the ones in each single solvent. The coil dimensions are influenced not only by the polymer-each single solvent interactions but also by the interactions between two solvents and the associating tendency of the polymer. The unperturbed dimensions are not constant. The effect of the interactions between two solvents upon the unperturbed dimensions is great.

关 键 词：混合溶剂 排除体积效应 分子问相互作用力 高分子尺寸 无扰尺寸 

分 类 号：O631.4[理学—高分子化学]