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Polymers 2017, 9(6), 190;

Unfolding Kinetics of a Wormlike Chain under Elongational Flow

Lorentz Institute for Theoretical Physics, Leiden University, 2333 CA Leiden, The Netherlands
Received: 20 April 2017 / Revised: 19 May 2017 / Accepted: 24 May 2017 / Published: 26 May 2017
(This article belongs to the Special Issue Semiflexible Polymers)
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A simple theory of the unfolding kinetics of a semi-flexible polymer chain is presented in terms of a Kramers type picture for the energy of elongation. The hydrodynamic interactions are discussed in terms of slender body theory. It turns out that the elongation of the chain is basically linear in time and independent of the viscosity. The former prediction agrees with experiments on the stretching dynamics of DNA under planar elongational flow. Nevertheless, the theory overestimates the experimental rate by a significant amount for reasons that are unclear. View Full-Text
Keywords: wormlike chain; DNA; unfolding; Stokes flow; fibres; elongational flow wormlike chain; DNA; unfolding; Stokes flow; fibres; elongational flow

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Odijk, T. Unfolding Kinetics of a Wormlike Chain under Elongational Flow. Polymers 2017, 9, 190.

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