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
收藏
页码：383 / 395
页数：13
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