Retardation spectra for the existence of interphase in fiber composites
Article first published online: 9 MAR 2003
Copyright © 1983 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 28, Issue 12, pages 3641–3649, December 1983
How to Cite
Theocaris, P. S., Kefalas, V. and Spathis, G. (1983), Retardation spectra for the existence of interphase in fiber composites. J. Appl. Polym. Sci., 28: 3641–3649. doi: 10.1002/app.1983.070281205
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 6 JUN 1983
- Manuscript Received: 25 JAN 1983
Retardation spectra, derived from dynamic measurements of extension compliances along three decades on the logarithmic scale of frequencies in standard specimens prepared from a fiber-reinforced composite with their fibers parallel to the longitudinal axis of the specimens, have revealed the structure of the matrix material of the composite. The experimental results were used to prove that the physicochemical rearrangements in the vicinity of the inclusions, consisting of restrained development of the macromolecules and especially their side chains due to the presence of the other phase, concentration of voids and dirt, shrinkage stresses developed during curing and creating microcracks (radial as well as along the interface), are activated by the existence of high stress gradients and eventually stress singularities due to the strong adhesion developed between phases.