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Mechanical and swelling properties of HTPB‐based copolyurethane networks
Author(s) -
Jain S. R.,
Sekkar V.,
Krishnamurthy V. N.
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070480902
Subject(s) - swelling , triethanolamine , materials science , polybutadiene , ultimate tensile strength , polyol , propane , propellant , isocyanate , castor oil , polymer chemistry , polymer , composite material , prepolymer , polyurethane , chemical engineering , organic chemistry , chemistry , copolymer , analytical chemistry (journal) , engineering
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.