Transient Binding and Dissipation in Semi-flexible Polymer Networks

Details Transient Binding and Dissipation in Semi-flexible Polymer Networks Transient Binding and Dissipation in Semi-flexible Polymer Networks

2008-02-27

arxiv.org/abs/0802.3970v1

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 2 figures, including supplementary information

Scientific paper

10.1103/PhysRevLett.101.108101

While polymer solutions lack the mechanical stability only transiently cross-linked networks can fulfill the competing requirements of structural stability and maximal energy dissipation. Here, we show that transient cross-links entail local stress relaxation and energy dissipation in an intermediate elasticity dominated frequency regime. We quantify the mechanical response of a semi-flexible polymer network by experimentally tuning the off-rate of the transient cross-linker molecule and theoretically reproduce the measured frequency response by a model that is predicated on microscopic unbinding events.

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