黏度法研究稀溶液中高分子链尺寸的浓度依赖性  

Concentration-Dependent Polymer Chain Dimensions in Dilute Solutions Determined by Viscosity Measurement

作　　者：陈孝松[1] 杨海洋[1] 张玲[1] 朱平平[1] 何平笙[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：《高分子材料科学与工程》2010年第4期168-170,174,共4页Polymer Materials Science & Engineering

基　　金：高等学校博士学科点专项基金(20040358018)资助课题

摘　　要：测定了不同浓度聚苯乙烯(PS)θ溶液的黏度,确定了高分子之间的流体力学相互作用参数,由此确定了良溶剂中高分子链尺寸的浓度依赖性,结果表明,在良溶剂中随着浓度的增加,高分子链的尺寸有所收缩,但是变化的程度比较小,与Wolf的理论结果以及笔者以前对此所做的理论分析并不一致,文中对出现差异的原因进行了深入的探讨。Viscosity of polystyrene （PS） in solution with various concentration was measured and the hydrodynamic interaction of polymer chains in θ solution was determined. The concentration-dependent polymer chain dimension in good solvent was studied accordingly. It has been shown that polymer chains shrink in size with the increase of the polymer concentration in dilute solution. However,the shrinkage of polymer chains in dilute solution is not as significant as calculated from the theory of Wolf and our theoretical consideration presented previously. The origin of this discrepancy was discussed in detail in this paper.

关 键 词：聚苯乙烯 特性黏数 高分子链尺寸 θ溶剂 流体力学相互作用 

分 类 号：O631.4[理学—高分子化学]