CONCENTRATION AND TEMPERATURE-DEPENDENCE OF MOLECULAR MOTIONS IN POLYSTYRENE TETRAHYDROFURAN SOLUTIONS

被引：11

作者：

JOHNSON, BS

EDIGER, MD

YAMAGUCHI, Y

MATSUSHITA, Y

NODA, I

机构：

[1] UNIV WISCONSIN,DEPT CHEM,MADISON,WI 53706

[2] NALCO CHEM CO,NAPERVILLE,IL 60563

[3] NAGOYA UNIV,DEPT SYNTHET CHEM,NAGOYA,AICHI 464,JAPAN

来源：

POLYMER | 1992年 / 33卷 / 18期

基金：

美国国家科学基金会;

关键词：

POLYSTYRENE; SOLUTION DYNAMICS; DIFFUSION; FLUORESCENCE; ANISOTROPY; SEGMENTAL DYNAMICS; FRICTION;

D O I：

10.1016/0032-3861(92)90383-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The fluorescence anisotropy decay method is used to measure the rotational diffusion of 9,10-diphenylanthracene and the segmental motion of anthracene-labelled polystyrene in tetrahydrofuran solutions of polystyrene. The concentration dependences of these two measures of microscopic friction are reported from pure solvent to 70% polymer at 4.5, 25.0 and 45.5-degrees-C. These results are compared to previously reported measurements of the translational diffusion of methyl red in the same system, and to the temperature dependence of the solution viscosity of a closely related system. The three measures of microscopic friction show similar concentration dependences.

引用

页码：3916 / 3929

页数：14

共 45 条

[1] DIELECTRIC NORMAL MODE PROCESS IN UNDILUTED CIS-POLYISOPRENE [J].