Mechanical and swelling properties of HTPB-based copolyurethane networks
Article first published online: 10 MAR 2003
Copyright © 1993 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 48, Issue 9, pages 1515–1523, 5 June 1993
How to Cite
Jain, S. R., Sekkar, V. and Krishnamurthy, V. N. (1993), Mechanical and swelling properties of HTPB-based copolyurethane networks. J. Appl. Polym. Sci., 48: 1515–1523. doi: 10.1002/app.1993.070480902
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 21 AUG 1992
- Manuscript Received: 11 JUN 1992
Copolyurethanes of hydroxy terminated polybutadiene (HTPB) and ISRO–Polyol (ISPO), an indigenously developed castor-oil based polyol, have been prepared using toluene diiso-cyanate and hexamethylenediisocyanate. The mechanical strength and swelling characteristics of the copolyurethanes cured with trimethylol propane and triethanolamine have been studied to evolve improved solid propellant binders. By varying the ratios of the two hydroxy pre-polymers, chain extenders, and crosslinkers, copolyurethanes having a wide range of tensile strength and elongation could be obtained. Many of these systems are desirable for their use as propellant binders. The results have been explained in terms of the measured crosslink densities and other swelling properties. © 1993 John Wiley & Sons, Inc.