Theory and Review
Strength of elastorners—a perspective
Article first published online: 25 AUG 2004
Copyright © 1977 Society of Plastics Engineers, Inc.
Polymer Engineering & Science
Volume 17, Issue 3, pages 129–143, March 1977
How to Cite
Smith, T. L. (1977), Strength of elastorners—a perspective. Polym Eng Sci, 17: 129–143. doi: 10.1002/pen.760170302
- Issue published online: 25 AUG 2004
- Article first published online: 25 AUG 2004
The dependence of stress-strain curves on temperature and extension rate is first discussed qualitatively along with aspects of the fracture process. Considered thereafter are the strength and extensibility, measured over broad ranges of temperature and extension rate, of elastomers in several classes: (a) singlephase non-crystallizable; (b) crystallizable, both unfilled and containing a reinforcing filler; and (c) block copolymers which contain plastic domains. It is shown that all single-phase noncrystallizable elastomers lack toughness except under restricted test conditions and that toughness necessitates a dispersed phase. Data are presented on crystallizable rubber vulcanizates and on polyurethane and poly(urea-urethane) block copolymers to show that plastic domains are highly effective sources of strength. The properties of these block copolymers are examined in detail, and their strengths are compared with those of other segmented copolymers and triblock elastomers. Factors responsible for strength are delineated.