Simulations of dynamics and viscoelasticity in highly entangled solutions of semiflexible rods

Shriram Ramanathan, David C. Morse

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Brownian dynamics simulations are used to study highly entangled solutions of semiflexible polymers. Bending fluctuations of semiflexible rods are significantly affected by entanglement only above a concentration c**, where c** ∼ 103 L-3 for chains of length L similar to their persistence length. For c> c**, the tube radius Re approaches a dependence Re c-3 5 and the linear viscoelastic response develops an elastic plateau that is absent for c< c**. Experiments on isotropic solutions of F-actin are shown to span concentrations near c** for which the predicted asymptotic scaling of the plateau modulus, G c7 5, is not yet valid.

Original languageEnglish (US)
Article number010501
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume76
Issue number1
DOIs
StatePublished - Jul 6 2007

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