Tuesday, 12 October 2004 - 2:15 PM

This presentation is part of : Wineman Symposium

Chemorheological Degradation of Natural Rubber at Elevated Temperatures: Experiments and Simulation

John Shaw1, Alan Jones2, and Alan Wineman1. (1) University of Michigan, 1320 Beal Avenue, Department of Aerospace Engineering, Ann Arbor, MI 48109, (2) University of Illinois, Beckman Institute, 405 N. Mathews Avenue , Urbana, IL 61801

An experimental study of the degradation of a commercial-grade filled natural rubber was conducted. Various temperature histories were investigated for which stress relaxation occurred due to viscoelastic and scission processes. A multi-network model in the framework of finite elasticity will be presented that includes the effects of entropic stiffening, thermal expansion, viscoelasticity, scission, recrosslinking, and oxygen diffusion/depletion. The results of a numerical simulation scheme to predict the mechanical response for arbitrary temperature and stretch histories are compared to uniaxial experimental results.

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