A comparative study of stress-induced crystallization of guayule, hevea, and synthetic polyisoprenes
Article first published online: 9 MAR 2003
Copyright © 1982 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 27, Issue 9, pages 3553–3567, September 1982
How to Cite
Shimomura, Y., White, J. L. and Spruiell, J. E. (1982), A comparative study of stress-induced crystallization of guayule, hevea, and synthetic polyisoprenes. J. Appl. Polym. Sci., 27: 3553–3567. doi: 10.1002/app.1982.070270929
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 7 APR 1982
- Manuscript Received: 19 FEB 1982
A comparative study of the stress induced crystallization of natural (Hevea, Guayule) and synthetic high cis-1,4-polyisoprenes at room temperature is presented. Hevea and Guayule are both found using WAXS to crystallize into the unit cell of Morss and Bunn previously described for Hevea. DSC studies of polyisoprenes held at −25°C indicate that Hevea and Guayule crystallize more rapidly than synthetics. Studies of relative birefringence and stress decay following uniaxial extension confirm this. Under conditions of comparison at the same stress, raw Hevea crystallizes more rapidly than extracted Hevea, Guayule, and the other polyisoprenes.