真空安定性判据对几种新型高能量密度化合物的适用性研究

To determine the applicability of vacuum stability method to new high energy density compounds, the thermal decomposition processes of hexanitrohexaazaisowurtzitane(CL-20), ammonium dinitramide(ADN), 1, 3, 3-trinitroazetidine(TNAZ), 3, 4-dinitrofuranzan oxyfurazan(DNTF), RDX and nitroglycerin/ nitrocellulose(NC+NG) (mass ratio of 50:50) under constant temperature were investigated by NBK LAWA gasometric measuring system. The calculated total decomposition evolved gas are 653.53-662.38, 613.80-619.82, 624.04-636.223, 601.52-629.82, 594.52-617.25 and 556.74-569.22mL/g, respectively. The reaction depths of 2mL of vacuum stability criterion are all no more than 0.4%. The corresponding safety factors of all the samples are greater than 2.5. The decomposition mechanism functions and kinetic parameters of the typical traditional energetic materials and high energy density materials were analyzed. Through time-temperature equivalence relation, the decomposition time of high energy density materials to 2mL at 100℃ are 7341-8967, 2091-2808, 438-664 and 3955-3997h, respectively, which are much longer than the test time of 48h stipulated by vacuum stability method. The times for NC+NG (50:50) and RDX to 2mL at 100℃ are 5191-6316h and 111-241h. By contrast verification, it is proved that the 2mL criterion of vacuum stability method can be applied to these new high energy density compounds.