Force-Extension Relation and Plateau Modulus for Wormlike Chains

Details Force-Extension Relation and Plateau Modulus for Wormlike Chains Force-Extension Relation and Plateau Modulus for Wormlike Chains

1996-05-29

arxiv.org/abs/cond-mat/9605181v1

Physics

Condensed Matter

5 pages, 1 eps-figure, to appear in PRL

Scientific paper

10.1103/PhysRevLett.77.306

We derive the linear force-extension relation for a wormlike chain of arbitrary stiffness including entropy elasticity, bending and thermodynamic buckling. From this we infer the plateau modulus $G^0$ of an isotropic entangled solution of wormlike chains. The entanglement length $L_e$ is expressed in terms of the characteristic network parameters for three different scaling regimes in the entangled phase. The entanglement transition and the concentration dependence of $G^0$ are analyzed. Finally we compare our findings with experimental data.

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