Effects of crosslinking on mechanical properties of hydroxy-terminated polybutadiene binder

Abstract

A series of composite propellant binder compositions synthesized by the reaction of 4,4-diphenyl methane disocyanate with hydroxy-terminated polybutadiene, HTPB instead of standard polyols. Composition studies on different of HTPB used in the reactions have been carried out. It was found that binders using HTPB showed an improvement on peel strengths and shear strengths. On the other hand, they also showed some significant decreasing on the tensile strengths and the elongations. The optimum combinations between HTPB and standard polyols yielding acceptable tensile strength and good peel and shear strengths with aluminum alloys were proposed.