MODE SELECTION IN THE DYNAMICS OF SHEARED POLYMER-SOLUTIONS

被引：70

作者：

DIXON, PK ^{[1
]}

PINE, DJ ^{[1
]}

WU, XI ^{[1
]}

机构：

[1] UNIV PITTSBURGH,DEPT PHYS,PITTSBURGH,PA 15260

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.68.2239

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report transient light scattering measurements upon the cessation of shear for a semidilute polymer solution under theta conditions. The polymer solution demonstrates two modes of relaxation for concentration fluctuations in equilibrium. The transient measurements show that the mechanism that couples the concentration fluctuations to the shear flow, and thereby enhances concentration fluctuations, selectively enhances only the slower of the two equilibrium modes. This selective enhancement generates a long-wavelength peak in the shear-enhanced structure.

引用

页码：2239 / 2242

页数：4

共 16 条

[1] DYNAMICAL BEHAVIOR OF SEMIDILUTE POLYMER-SOLUTIONS IN A THETA-SOLVENT - QUASI-ELASTIC LIGHT-SCATTERING EXPERIMENTS [J].