A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS*

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A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS*

Papers | Updated：2021-06-21

- A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS*
- Vol. 17, Issue 2, Pages: 151-158(1999)
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- Published：20 April 1999
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A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS*[J]. 1999, 17(2): 151-158.
DOI：

A RHEOLOGICAL MODEL FOR POLYMER MELTS WITH INTERNAL STRUCTURE IN FLOW FIELDS*[J]. 1999, 17(2): 151-158. DOI：

摘要

Conceptually

an imagined conformation ellipsoid is supposed to represent the shape of a polymerchain for polymer melts in flow fields and to be equivalent to the volume element in a mathematical sense incontinuum mechanics. A power law dependence of shear modulus of polymer melts on detC

referred to asenvelope volume

is proposed. Based on those assumptions and the non-linear relation of shear modulus

aphenomenological viscoelastic model is derived. The model is tested in simple shear flow

simple elongational flow

oscillatory shear flow

and relaxation process after flow suddenly stopped.The results show that the model works well to predict the change of internal structure and viscoelastic performance of polymer melts in flow fields.

Abstract

Conceptually

referred to asenvelope volume

is proposed. Based on those assumptions and the non-linear relation of shear modulus

aphenomenological viscoelastic model is derived. The model is tested in simple shear flow

simple elongational flow

oscillatory shear flow

and relaxation process after flow suddenly stopped.The results show that the model works well to predict the change of internal structure and viscoelastic performance of polymer melts in flow fields.

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