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Anisotropic Mobility Model for Polymers under Shear and its Linear Response Functions

By Takashi Uneyama, Kazushi Horio and Hiroshi Watanabe


We propose a simple dynamic model of polymers under shear with an anisotropic mobility tensor. We calculate the shear viscosity, the rheo-dielectric response function, and the parallel relaxation modulus under shear flow deduced from our model. We utilize recently developed linear response theories for nonequilibrium systems to calculate linear response functions. Our results are qualitatively consistent with experimental results. We show that our anisotropic mobility model can reproduce essential dynamical nature of polymers under shear qualitatively. We compare our model with other models or theories such as the convective constraint release model or nonequilibrium linear response theories.Comment: 23 pages, 5 figures, REVTeX, to appear in Phys. Rev.

Topics: Condensed Matter - Soft Condensed Matter
Year: 2011
DOI identifier: 10.1103/PhysRevE.83.061802
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