Thermal Fluctuations and Rubber Elasticity

Details Thermal Fluctuations and Rubber Elasticity Thermal Fluctuations and Rubber Elasticity

2006-09-21

arxiv.org/abs/cond-mat/0609533v1

Phys. Rev. Lett. 98, 075502 (2007)

Physics

Condensed Matter

Soft Condensed Matter

4 RevTeX pages, 1 figure, submitted to PRL

Scientific paper

The effects of thermal elastic fluctuations in rubber materials are examined. It is shown that, due to an interplay with the incompressibility constraint, these fluctuations qualitatively modify the large-deformation stress-strain relation, compared to that of classical rubber elasticity. To leading order, this mechanism provides a simple and generic explanation for the peak structure of Mooney-Rivlin stress-strain relation, and shows a good agreement with experiments. It also leads to the prediction of a phonon correlation function that depends on the external deformation.

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