LONGEST RELAXATION-TIMES OF LINEAR-POLYMERS IN CONCENTRATION REGIONS BETWEEN THE CRITICAL CONCENTRATIONS FOR ZERO-SHEAR VISCOSITY AND FOR STEADY-STATE COMPLIANCE

被引：5

作者：

TAKAHASHI, Y

WAKUTSU, M

NODA, I

机构：

[1] Department of Synthetic Chemistry, Nagoya University, Nagoya 464-01, Furo-cho, Chikusa-ku

来源：

MACROMOLECULES | 1990年 / 23卷 / 01期

关键词：

D O I：

10.1021/ma00203a041

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 longest relaxation times rm of linear polymers in concentration regions between the critical concentrations for the zero-shear viscosity η° and for the steady-state compliance Je, that is, in a semidilute region for η° and in a dilute (not entangled) region for Je, were studied by measuring the stress relaxation after cessation of steady shear flow. It is concluded that the weight-average relaxation time ϊw (= η° Je) is well represented by rm and the magnitudes of the contribution of the terminal relaxation processes to η° are the same in semidilute solutions for η°, whether the entanglements are effective to Je or not. © 1990, American Chemical Society. All rights reserved.

引用

页码：242 / 245

页数：4

共 18 条

[1]

[Anonymous], 1974, ENTANGLEMENT CONCEPT

[2]

Doi M., 1986, THEORY POLYM DYNAMIC

[3] NORMAL STRESS AND SHEAR STRESS IN A VISCOELASTIC LIQUID UNDER OSCILLATORY SHEAR FLOW [J].