Communication: effects of stress on the tube confinement potential and dynamics of topologically entangled rod fluids
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Updated: May 28, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Daniel M Sussman1, Kenneth S Schweizer
1Department of Physics, University of Illinois, Urbana, Illinois 61801, USA.
Abstract:
A microscopic theory for the effect of applied stress on the transverse topological confinement potential and slow dynamics of heavily entangled rigid rods is presented. The confining entanglement force localizing a polymer in a tube is predicted to have a finite strength. As a consequence, three regimes of terminal relaxation behavior are predicted with increasing stress: accelerated reptation due to tube widening (dilation), relaxation via deformation-assisted activated transverse barrier hopping, and complete destruction of the lateral tube constraints corresponding to microscopic yielding or a disentanglement transition.
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