Viscoelasticity of dilute solutions of semiflexible polymers

Matteo Pasquali, V. Shankar, David C. Morse

Research output: Contribution to journalArticlepeer-review

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Abstract

We show using Brownian dynamics simulations and theory how the shear relaxation modulus of dilute solutions of relatively stiff semiflexible polymers differs qualitatively from that of rigid rods. For chains shorter than their persistence length, exhibits three time regimes: At very early times, when the longitudinal deformation is affine, Over a broad intermediate regime, during which the chain length relaxes, At long times, mimics that of rigid rods. A model of the polymer as an effectively extensible rod with a frequency dependent elastic modulus quantitatively describes throughout the first two regimes.

Original languageEnglish (US)
Article number020802
Pages (from-to)208021-208024
Number of pages4
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume64
Issue number2
DOIs
StatePublished - Aug 2001

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