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Polymers 2016, 8(10), 353;

Microstructure of Sheared Entangled Solutions of Semiflexible Polymers

Institut für theoretische Physik, Universität Leipzig, Postfach 100920, 04009 Leipzig, Germany
Institute of Complex Systems 7: Biomechanics, Forschungszentrum Jülich, 52425 Jülich, Germany
Authors to whom correspondence should be addressed.
Academic Editor: Martin Kröger
Received: 25 July 2016 / Revised: 14 September 2016 / Accepted: 16 September 2016 / Published: 28 September 2016
(This article belongs to the Special Issue Semiflexible Polymers)
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We study the influence of finite shear deformations on the microstructure and rheology of solutions of entangled semiflexible polymers theoretically and by numerical simulations and experiments with filamentous actin. Based on the tube model of semiflexible polymers, we predict that large finite shear deformations strongly affect the average tube width and curvature, thereby exciting considerable restoring stresses. In contrast, the associated shear alignment is moderate, with little impact on the average tube parameters, and thus expected to be long-lived and detectable after cessation of shear. Similarly, topologically preserved hairpin configurations are predicted to leave a long-lived fingerprint in the shape of the distributions of tube widths and curvatures. Our numerical and experimental data support the theory. View Full-Text
Keywords: shear alignment; F-actin; tube model shear alignment; F-actin; tube model

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lämmel, M.; Jaschinski, E.; Merkel, R.; Kroy, K. Microstructure of Sheared Entangled Solutions of Semiflexible Polymers. Polymers 2016, 8, 353.

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