The composite propellant with a solid content of 80％ was prepared by using 3,3'-bisazidomethyloxetane3-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,Tg 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 (10 MPa),density is 1.7924 g/cm3 and heat of detonation is 6 124 kJ/kg,Tg is-50.80℃,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.%以3,3'-双叠氮甲基环氧丁烷-3-叠氮甲基-3'-甲基环氧丁烷无规共聚物(P(BAMO-r-AMMO))为高分子预聚物,通过能量计算优化配方组成,制备了固含量为80％的P(BAMO-r-AMMO)基热固性复合推进剂.采用最小自由能法对3种配方进行了能量计算,用表界面张力仪、氧弹式量热仪、差示扫描量热仪(DSC)和静态拉伸试验测定了样品的密度、爆热、玻璃化转变温度(Tg)和力学性能.结果表明,该复合推进剂在10 MPa压强下的标准理论比冲可达275.43s,密度为1.7924 g/cm3,爆热达6124 kJ/kg,Tg为-50.80℃,拉伸强度为1.24 MPa,断裂伸长率为21％,高于相同配方下端羟基聚丁二烯(HTPB)基和聚叠氮缩水甘油醚(GAP)基热固性复合推进剂,较HTPB基和GAP基热固性复合推进剂有更优良的综合性能.
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