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Towards realistic rheological models for polymer melt processing
Author(s) -
Feigl Kathleen,
Christian Öttinger Hans
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971210117
Subject(s) - reptation , rheology , viscoelasticity , statistical physics , stochastic modelling , polymer , materials science , computer science , mechanics , thermodynamics , mathematics , physics , statistics , composite material
Greatly needed improvements to rheological models of polymer fluids can best be made by understanding and modifying a model on the molecular level, where the physics governing real fluids are created. For this purpose, stochastic simulations are an indispensible tool. The usefulness of stochastic simulations for kinetic theory models are well‐known. In this paper, we show that the class of Rivlin‐Sawyers, or K‐BKZ, integral models is also subject to a molecular interpretation and can be simulated using stochastic techniques. We also illustrate how an existing molecular model can be modified, resulting in better predictions of viscoelastic behavior. For this we formulate a stochastic simulation of a reptation model modified to account for double reptation and tube‐length fluctuations.