ADN高能固体推进剂的吸湿性

采用平衡器、高效液相色谱、水接触角和机械感度等方法研究ADN及改性ADN基高能固体推进剂的吸湿规律和感度特性。研究结果表明，ADN基高能固体推进剂样品具有较强的吸湿性，25 ℃，相对湿度75%下吸湿72 h后，增重率达9%，且样品表面出现大量含ADN的液滴；而改性ADN基高能固体推进剂的吸湿性显著降低，增重率仅为0.3%，无液滴出现，主要原因是改性ADN与水的接触角显著增加，由改性前8°增加至78°，降低了ADN与空气中水分子的吸附作用。改性ADN基高能固体推进剂的撞击感度和摩擦感度明显改善，临界撞击能由改性前8.1 J提高至14.3 J，摩擦感度由60%降低至32%，这为ADN在固体推进剂中的应用奠定了一定的基础。

Hygroscopic Properties of Ammonium Dinitroamide-based High Energy Propellant

The hygroscopicity and sensitivity of Ammonium Dinitroamide (ADN) and ADN-based solid propellants were comparatively investigated through the use of balancer, high performance liquid chromatography, and analysis of contact angle for water and mechanical sensitivity. The results showed that the ADN-based high-energy solid propellant samples had strong hygroscopicity. At 25°C and a relative humidity of 75%, a large number of ADN-containing droplets appeared on the surface of the propellant sample, after 72 hours of moisture absorption, and the percentage of weight gain was 9%. The hygroscopicity of the modified ADN-based propellant was significantly reduced with a weight gain of only 0.3%, and no droplets appeared. The analysis indicated that the contact angle of the modified ADN with water increased significantly, from 8° before modification to 78° after modification, resulting in the remarkable reduction of the adsorption of the modified ADN with water molecules in the air. The impact sensitivity of the propellant before and after ADN modification was increased from 8.1 J to 14.3 J, and its friction sensitivity before and after ADN modification was reduced from 60% to 32%. The impact sensitivity and friction sensitivity of the propellant were both apparently improved. The findings of this work is of great referential significance for the application of ADN in solid propellants.