一种非铅催化硝胺改性双基低燃速低燃温推进剂

A Non-lead Catalyzed Nitramine Modified Double Base Propellant with Low Burning Rate and Low Flame Temperature

为降低双基低燃速低燃温推进剂的燃速、燃温，将含能添加剂PQ加入含HMX的CMDB推进剂中。研究了含能添加剂PQ与HMX复配后部分取代配方中的NC和NG对燃速、燃温的影响，并采用常规的Pb—Cu盐复合催化剂和非铅催化剂体系对该配方体系的燃烧性能进行了调节。结果表明，加入适量的复合含能添加剂能有效降低推进剂的燃速和燃温，可使推进剂理论燃温低于1200K，燃速低于2．5mm／s（10MPa，20℃）；与常规Pb—Cu盐催化剂相比，非铅催化剂的催化效率更高，配方的燃烧性能更好，压强指数可低至0．16（3～7MPa），获得平台燃烧。含能添加剂PQ降低燃速、燃温的原因是加入PQ后，推进剂的能量水平下降以及PQ在分解时的熔化吸热降低了化学反应速率。

To decrease the burning rate and flame temperature of low flame temperature and low buring rate double base propellant, an energetic additive （PQ, a nitramine product） was added to a CMDB propellant containing HMX. The effect of the substitution of composite energetic additives composed of PQ and HMX for NC and NG partly on the burning rate and flame temperature of the propellant was studied, and the combustion performance of the propellant was adjusted using general Pb-Cu catalysts and non-lead salt catalysts. The results revealed that the PQ-HMX composite energetic additives are able to efficiently decrease the theoretical flame temperature to lower than 1 200K and the burning rate was lower than 2.5mm/s at 10MPa and 20 ℃. Comparing with the use of general Pb-Cu catalysts, non-lead salt catalysts had higher catalyzing efficiency . The propellant containing non-lead salt catalysts showed better combustion performance, the pressure exponent reached as low as 0. 16 in the range of 3-TMPa and appeared a plateau combustion phenomenon. The decrease of the burning rate and flame temperature by adding energetic additive PQ is due to the reduction of energy level of the propellant and the decrease of the chemical reaction rate by the endothermic melting of PQ.