The effect of postcure time on the fracture properties and nodular morphology of an epoxy resin
Article first published online: 9 MAR 2003
Copyright © 1979 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 23, Issue 4, pages 1037–1042, 15 February 1979
How to Cite
Mijovic, J. S. and Koutsky, J. A. (1979), The effect of postcure time on the fracture properties and nodular morphology of an epoxy resin. J. Appl. Polym. Sci., 23: 1037–1042. doi: 10.1002/app.1979.070230408
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 26 JAN 1978
- Manuscript Received: 23 DEC 1977
The effect of different postcure times on the fracture properties and morphology of an epoxy resin was studied. The fracture energy for crack initiation and arrest was calculated for each sample and plotted as a function of the postcure time. Nodules (25–35 nm in diameter) were observed on all fracture surfaces. Of considerable interest was the alignment of nodules in the direction of crack propagation. Longer postcure times are thought to alter the fracture energy by causing additional crosslinking in the internodular matrix.