一种含能硝基化合物对低燃速低燃温双基推进剂性能影响

Experimental Study on Some Energetic Nitro-compound in DB Propellant with Low Burning Rate and Low Flame Temperature

为进一步降低低燃速低燃温双基推进剂的燃速、燃温,对一种含能硝基化合物的降温、降速效果进行了实验研究,设计了系列含无机铅盐、有机铜盐及过渡元素金属催化剂的双基配方。通过燃速测试及高压差示扫描量热法(PDSC)研究上述推进剂的燃烧性能和热分解特性。含该硝基化合物的推进剂DSC曲线呈三峰放热,放热峰峰温分别在200℃、280℃、350℃左右,第三峰不明显。结果表明:该含能硝基化合物能有效降低推进剂的燃速、燃温,但使推进剂的压强指数增大,而加入催化剂能改善推进剂的燃烧性能,使压强指数降低,分解放热量也降低。

To decrease farther the burning rate and the flame temperature of DB propellant with low burning rate and low flame temperature, an experimental study was carried out to explore the effect of a nitro compound on the burning rate and the flame temperature. Series of DB formulations were designed with inorganic lead, organic copper salt and transition metal catalysts. The thermal decomposition and combustion of the propellants were studied by testing the burning rate and PDSC. There are three peaks of heat release on the DSC curves of DB propellant containing the energetic nitro compound, and the heat release temperatures are around 200 ℃, 280 ℃ and 350 ℃, but the third peak is not obvious. Results show that the energetic nitro compounds can effectively decrease the burning rate and the flame temperature of the DB propellant, but increase the pressure exponent, which can be improved by adding catalysts. The collaborations of the energetic nitro compounds and the catalysts can provide DB propellant lower burning rate, lower flame temperature, smaller pressure exponent, and less quantity of decomposition heat.