Noncrystalline Binder Based Composite Propellant

Abstract

This study reports on propellants based on cross-linked HTPE binder plasticized with butyl nitroxyethylnitramine (BuNENA) as energetic material and HP 4000D as noncrystalline prepolymer. This binder was conducted with solid loading in the 85%. The results showed an improvement in processability, mechanical properties and burning rate. In addition, its propellant delivers (about 6 seconds) higher performance (specific impulse) than the best existing composite solid rocket propellant. Thermal analyses have performed by (DSC, TGA). The thermal curves have showed a low glass transition temperature () of propellant samples, and there was no sign of binder polymer crystallization at low temperatures (−50°C). Due to its high molecular weight and unsymmetrical or random molecule distributions, the polyether (HP 4000D) has been enhanced the mechanical properties of propellants binder polymer over a large range of temperatures [−50, 50°C]. The propellants described in this paper have presented high volumetric specific impulse (>500 s·gr·cc−1). These factors combined make BuNENA based composite propellant a potentially attractive alternative for a number of missions demanding composite solid propellants.

Study on Epoxy Resin Toughened by Epoxidized Hydroxy-Terminated Polybutadiene

“…Epoxy resin (EP) is a material with excellent properties, which is widely used in semiconductor equipment manufacturing [ 1 , 2 , 3 ], adhesives [ 4 , 5 ], aerospace [ 6 , 7 , 8 ] and other fields. Epoxy resin based on the diglycidylether of bisphenol A (DGEBA) exhibited good mechanical and thermal properties, high chemical and corrosion resistance properties as well as excellent adhesion properties because of the presence of hydroxyl and epoxy groups of EP.…”

The Preparation of NC Microspheres and BuNENA Modified NC Microspheres by the Breath Figures Method

“…The low melting point is beneficial with regard to improvement in the cryogenic mechanical properties of the propellant; at the same time, the volatility of a blend of BuNENA and NC is only half that of NG and NC. BuNENA can be introduced into the formulation of NC-based propellants, glycidyl azide polymer (GAP)-based propellants, and hydroxy-terminated polyether (HTPE)-based propellants as an insensitive plasticiser [8,9].…”