Presented at the Asilomar Conference on Polymeric Materials, Monterey, California, January 30–February 2, 1990, and 32nd Microsymposium on Macromolecules “Polymer Blends,” Prague, Czechoslovakia, July 17–20, 1989.
Chain structure, phase morphology, and toughness relationships in polymers and blends†
Article first published online: 26 AUG 2004
Copyright © 1990 Society of Plastics Engineers
Polymer Engineering & Science
Volume 30, Issue 13, pages 753–761, July 1990
How to Cite
Wu, S. (1990), Chain structure, phase morphology, and toughness relationships in polymers and blends. Polym Eng Sci, 30: 753–761. doi: 10.1002/pen.760301302
- Issue published online: 26 AUG 2004
- Article first published online: 26 AUG 2004
We present chain structure, phase morphology, and toughness relationships in thermoplastic polymers and polymer/rubber blends. In neat polymers, molecular aspects of craze/yield behavior are controlled by two chain parameters: entanglement density νe and characteristic ratio C∞. The crazing stress is proportional to ν, and the yield stress is proportional to C∞. The dispersed rubber toughens a polymer/rubber blend mainly by promoting energy dissipation of the matrix. The toughening efficiency correlates with the rubber phase morphology and the chain structure of the matrix.