Polyimides, due to their superior mechanical behavior at high temperatures, are used in a variety of applications that include aerospace, automobile and electronic packaging industries, as matrices for composites, as adhesives etc. In this paper, we extend our previous model in [S. Karra, K. R. Rajagopal, Modeling the non-linear viscoelastic response of high temperature polyimides, Mechanics of Materials, In press, doi:10.1016/j.mechmat.2010.09.006], to include oxidative degradation of these high temperature polyimides. Appropriate forms for the Helmholtz potential and the rate of dissipation are chosen to describe the degradation. The results for a specific boundary value problem, using our model compares well with the experimental creep data for PMR-15 resin that is aged in air.
@article{arxiv.1011.5451,
title = {A model for the degradation of polyimides due to oxidation},
author = {Satish Karra and K. R. Rajagopal},
journal= {arXiv preprint arXiv:1011.5451},
year = {2015}
}
Comments
13 pages, 2 figures, submitted to Mechanics of Time-dependent Materials