Shear yield and crazing stresses in selected glassy polymers
Article first published online: 10 MAR 2003
Copyright © 1993 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 47, Issue 4, pages 619–629, 20 January 1993
How to Cite
Ikeda, R. M. (1993), Shear yield and crazing stresses in selected glassy polymers. J. Appl. Polym. Sci., 47: 619–629. doi: 10.1002/app.1993.070470406
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 3 APR 1992
- Manuscript Received: 11 JUL 1991
The plane strain shear yield stress and the triaxial crazing stress were determined for several commercial glassy polymers as a function of temperature. The polymers considered were: polycarbonate (Lexan®), polysulfone (Udel®), polyetherimide (Ultem®), polyarylate (Arylon®), and an amorphous nylon (Zytel® 330). When normalized to Tg the data for the various polymers were similar but not identical. An exception may be the triaxial crazing strains. In the temperature region between [T–Tg] = −300° and −50°C the crazing strains were all small (<1.5%), showed little temperature dependence, and appeared identical within the precision of our measurements. For temperatures below Tg and above any major secondary relaxation, Poisson's ratio was found to be constant for all of the polymers examined, 0.42 (±5%). © 1993 John Wiley & Sons, Inc.