Curvature-driven shear banding in polymer melts

被引：19

作者：

Goveas, JL

Fredrickson, GH

机构：

[1] Rice Univ, Dept Chem Engn MS362, Houston, TX 77025 USA

[2] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF RHEOLOGY | 1999年 / 43卷 / 05期

关键词：

D O I：

10.1122/1.551020

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We consider a melt of two chemically identical homopolymers of different lengths. Both species obey Rouse dynamics, and always form a homogeneous mixture at equilibrium. Under shear flow in a wide-gap Couette, such a system exhibits strongly inhomogeneous steady states, that resemble macro-phase separated blends. The corresponding velocity profile is nonmonotonic and exhibits distinct shear bands. These findings may have implications for the processing of polydisperse polymer melts. (C) 1999 The Society of Rheology. [S0148-6055(99)00805-6].

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页码：1261 / 1277

页数：17

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