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使用N-丁基硝氧乙基硝胺(Bu-NENA)全部替代硝化甘油(NG),通过无溶剂法制备了Bu-NENA/硝化纤维素(NC)双基推进剂,并对样品的感度、热分解特性、挥发性和力学性能进行了研究。结果表明,Bu-NENA替代NG后,双基推进剂的特性落高H50由8.1 cm提高到27.1 cm,摩擦感度由94%降低到18%,机械感度大幅降低;起始分解温度和第一分解阶段峰温由120.31℃和151.54℃分别提高到144.58℃和179.47℃,均提高24℃以上;Bu-N EN A/N C双基推进剂在80,90,100℃下的挥发速率常数均低于NG/NC推进剂在对应温度下的挥发速率常数,推进剂的挥发性降低;高温(50℃)、常温(20℃)和低温(-40℃)下,Bu-N EN A/N C双基推进剂断裂伸长率均提高,尤其是低温断裂伸长率可达13.63%,是N G/N C推进剂的1.63倍。
Bu-NENA / nitrocellulose (NC) double-base propellant was prepared by solvent-free method using N-butylnitrobenzene nitroamine (Bu-NENA) instead of nitroglycerin (NG) , Thermal decomposition characteristics, volatility and mechanical properties were studied. The results show that after substituting Bu-NENA for NG, the characteristic drop of double-base propellant H50 increased from 8.1 cm to 27.1 cm, the friction sensitivity decreased from 94% to 18%, and mechanical sensitivity decreased significantly. The initial decomposition temperature and the first decomposition The peak temperature increased from 120.31 ℃ and 151.54 ℃ to 144.58 ℃ and 179.47 ℃ respectively, both of them increased above 24 ℃. The volatilization rate constants of Bu-N EN A / NC double-base propellant at 80, 90 and 100 ℃ were lower than that of NG / NC propellants volatilization rate constant at the corresponding temperature, propellants decreased volatility; Bu-N EN A / NC double-base propellant at high temperature (50 ℃), normal temperature (20 ℃) and low temperature (-40 ℃) Elongation at break was increased, especially at low temperature elongation at break of up to 13.63%, 1.63 times that of NG / NC propellant.