A multi-mode CCR model for entangled polymers with chain stretch

被引：39

作者：

Ianniruberto, G ^{[1
]}

Maitucci, G ^{[1
]}

机构：

[1] Univ Naples Federico II, Dept Chem Engn, I-80125 Naples, Italy

来源：

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS | 2002年 / 102卷 / 02期

关键词：

entangled polymers; chain stretch; CCR; multiple modes; power-laws;

D O I：

10.1016/S0377-0257(01)00188-4

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The model recently proposed by the authors [J.Rheol.,45 (2001) 1305-1318] to account for convective constraint release (CCR) and chain stretch in entangled polymers is here extended to a multiple mode situation. Such an extension, indispensable for the polydisperse case, is believed to be important also for monodisperse polymers, especially in view of chain-end fluctuations. The model is compared with existing steady and transient start-up data of shear flows. It is also shown how the model can help explaining the frequently observed power-laws, especially for the case of melts. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：383 / 395

页数：13

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