Application of P (BAMO-r-AMMO) in propellant

The composite propellant with a solid content of 80% was prepared by using 3, 3'-bisazidomethyloxetane-3-azidomethyl-3'-methyloxetane (P (BAMO-r-AMMO)) random copolymer as the prepolymer. The minimum free energy method was used to calculate the energy of formulation for the propellant. The density, heat of detonation, T_g and mechanical properties were measured by interfacial tension meter, oxygen bomb calorimeter, DSC and static tensile test. The results show that its standard theoretical specific impulse reaches 275.43 s (10MPa), density is 1.7924 g/cm³ and heat of detonation is 6124 kJ/kg, T_g is -50.80°C, tensile strength is 1.24 MPa and breaking elongation is 21%, which are higher than that of hydroxyl-terminated polybutadiene (HTPB) based and glycidyl azide polymer (GAP) based composite propellant under the same formulation, having more excellent comprehensive performance than HTPB based and GAP based composite propellant.