Investigation of Composite Solid Propellants Based on Nitrated Hydroxyl-Terminated Polybutadiene Binder

The burning rate was determined using a strand burner for NHTPB samples and for conventional HTPB propellant that had been prepared before this work with similar solid loading. The 10% NHTPB polymer was synthesized by epoxidizing the HTPB and then nitrating with dinitrogen pentoxide. The NHTPB used in this work was dried 60°C under continuous vacuum to remove the residual moisture. A moisture free NHTPB sample was stored in a closed vessel. The temperature of the mix is determined via a thermocouple inserted into the mixer blade. Hydroxyl-terminated polybutadiene (HTPB) has long been one of the most commonly used polymers in composite solid propellants because of such unique physicochemical properties as thermal dynamics, pyrolysis, and elasticity.