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Communication: Effects of stress on the tube confinement potential and dynamics of topologically entangled rod fluids
1. M. Doi and S. F. Edwards, The Theory of Polymer Dynamics (Oxford University, Oxford, 1986)
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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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