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The recovery of polymer melts after shear and elongational flows

J. Chem. Phys. 101, 7144 (1994); doi:10.1063/1.468340

Issue Date: 15 October 1994

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Ulrik Borgbjerg and Juan José de Pablo
Department of Chemical Engineering, University of Wisconsin Madison, Madison, Wisconsin 53706

Hans Christian Öttinger
Institut für Polymere, Eidgenossische Technische Hochschule, ETH-Zentrum, CH-8092 Zürich, Switzerland
This work examines the constrained recoil after steady shear flow and the free recovery after steady elongational flow of monodisperse polymer melts. Calculations are performed in the framework of the Curtiss–Bird theory using both conventional numerical integrations and nonequilibrium Brownian dynamics. The latter approach is shown to have significant advantages, particularly at high shear or elongational rates. The predicted curves of recovery as a function of shear rate exhibit an unusual maximum for which several explanations are proposed. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.
History: Received 7 February 1994; accepted 8 July 1994
Permalink: http://link.aip.org/link/?JCPSA6/101/7144/1
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KEYWORDS and PACS

Keywords
PACS
  • 47.50.+d
    Fluid dynamics Non-Newtonian fluid flows
  • 83.50.Ax
    Rheology Deformation; material flow Steady shear flows
  • 83.50.By
    Rheology Deformation; material flow Transient deformation and flow; time-dependent properties: start-up, stress relaxation, creep, recovery, etc.
  • YEAR: 1994

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (23)
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