Master curves of viscoelastic behavior in the plastic region of a solid polymer
Article first published online: 9 MAR 2003
Copyright © 1977 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 21, Issue 11, pages 2933–2941, November 1977
How to Cite
Titomanlio, G. and Rizzo, G. (1977), Master curves of viscoelastic behavior in the plastic region of a solid polymer. J. Appl. Polym. Sci., 21: 2933–2941. doi: 10.1002/app.1977.070211109
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 22 SEP 1976
- Manuscript Received: 30 JUN 1976
Stress relaxation and creep tests following strain ramps were made on Mylar, both above and below the yield stress. The ramp velocity was varied over a 40-fold range. All data exhibit nonlinear viscoelastic behavior. However, those obtained above the yield point, i.e., in the plastic region, could be reduced to single master curves for both the creep and the relaxation tests by means of a simple time shift factor. This factor is inversely proportional to the strain rate existing just prior to the test.