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A force field description for entanglements in polymer systems

  • J. Mewis
  • G. Schoukens
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 58)

Abstract

An extension of rheological bead-spring models that would encompass concentrated solutions and melts of high molecular weight polymers is investigated. As in some previous attempts the forces due to the interaction with surrounding molecules are represented by a force field. In a simple manner this force field takes into account the partial interpenetration of neighbouring molecules. A normal mode analysis renders a discrete relaxation spectrum for the model.

In further treatment the model parameters are considered as a set of adjustable variables. It is verified that the resulting form of the model describes the relevant features of the polymer systems under consideration.

The discussion is limited to monodisperse materials. The results are compared with experimental data taken from the literature as well as with other theories. The comparison covers the linear dynamic moduli, steady state shear flow and non-linear behaviour.

Of the molecular characteristics only molecular weight is considered. Its effect on the model parameters is investigated, particularly to find out whether the known deviations from the Rouse model could be described.

Keywords

Force Field Viscous Drag Normal Mode Analysis High Molecular Weight Polymer Rouse Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1975

Authors and Affiliations

  • J. Mewis
    • 1
  • G. Schoukens
    • 1
  1. 1.Instituut voor Chemie-ingenieurstechniekKatholieke Universiteit Te LeuvenHeverleeBelgium

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