Biaxial Deformations of Rubber: Entanglements or Elastic Fluctuations?
Abstract
The classical theory of rubber elasticity fails in the regime of large deformation. The un- derlying physical mechanism has been under debate for long time. In this work, we test the recently proposed mechanism of thermal elastic fluctuations by Xing, Goldbart and Radzi- hovsky1 against the biaxial stress-strain data of three distinct polymer networks with very different network structures, synthesized by Urayama2 and Kawabata3 respectively. We find that both the two parameters version and the one-parameter version of the XGR theory provide satisfactory description of the elasticity in whole deformation range. For comparison, we also fit the same sets of data using the slip-link model by Edwards and Vilgis with four parameters. The fitting qualities of two theories are found to be comparable.
Keywords
Cite
@article{arxiv.1007.4274,
title = {Biaxial Deformations of Rubber: Entanglements or Elastic Fluctuations?},
author = {Xiangjun Xing},
journal= {arXiv preprint arXiv:1007.4274},
year = {2013}
}
Comments
19 pages, 15 eps figures