The monolithic foamed propellants with high densities were prepared by casting and two-step foaming processes. Glycidyl azide polymer (GAP) and isocyanate were used as the binder system and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW, CL-20) was employed as the energetic component. The newly designed formulation containing 60 % CL-20 produced a force constant of 1077 J/g and low flame temperature of 2817 K. Two foamed propellants with densities of 1.32 g/cm³ and 1.53 g/cm³ were fabricated by a confined foaming process and examined by closed bomb tests. The results revealed that porosity significantly affects burning performance. A size effect on combustion behaviors was observed for the foamed propellant with 5.56 % porosity, and a double-hump progressive dynamic vivacity curve was obtained. At last, the 30 mm gun test was carried out to demonstrate the interior ballistic performance, and the muzzle velocity increased by 120 m/s at the same maximum chamber pressure when monolithic propellant was added in the charge.

通过浇注和两步发泡工艺制备了高密度整体式发泡推进剂。缩水甘油基叠氮化物聚合物 (GAP) 和异氰酸酯用作粘合剂体系，2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW, CL-20) 是用作能量成分。新设计的含有 60% CL-20 的配方产生 1077 J/g 的力常数和 2817 K 的低火焰温度。两种泡沫推进剂的密度分别为 1.32 g/cm ³和 1.53 g/cm ³通过密闭发泡工艺制造并通过封闭式炸弹测试进行检查。结果表明，孔隙率显着影响燃烧性能。观察了孔隙率为5.56%的泡沫推进剂的尺寸对燃烧行为的影响，并获得了双峰渐进动态活性曲线。最后进行了30mm火炮的内弹道性能试验，在装药中加入整体式推进剂的情况下，在相同的最大膛压下，炮口初速提高了120m/s。