Stretching an heteropolymer

Details Stretching an heteropolymer Stretching an heteropolymer

1997-11-06

arxiv.org/abs/cond-mat/9711051v1

Physics

Condensed Matter

Statistical Mechanics

Latex, 7 pages, 3 postscript figure

Scientific paper

10.1209/epl/i1998-00558-3

We study the influence of some quenched disorder in the sequence of monomers on the entropic elasticity of long polymeric chains. Starting from the Kratky-Porod model, we show numerically that some randomness in the favoured angles between successive segments induces a change in the elongation versus force characteristics, and this change can be well described by a simple renormalisation of the elastic constant. The effective coupling constant is computed by an analytic study of the low force regime.

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