AP对RDX热稳定性及AP/RDX爆轰性能的影响

In order to investigate the effect of different particle sizes of ammonium perchlorate (AP) on the thermal stability of RDX and the effect of AP on the energy release rule of RDX-based composite explosives, AP/RDX composite explosives with different AP content and particle sizes were designed, and their heat of explosion and detonation velocity were tested. The results show that the AP with particle sizes of 100-150μm, 10-13μm and 2μm all have acceleration on the decompostion of RDX, and the decomposition peak temperature of RDX decreases from 433℃ to 368℃, 417℃ to 365℃ and 375℃ to 321℃, respectively with the decrease of particle size of AP. As the addition of AP particle and its size decreases, the apparent activation energy of RDX in the mixtures decreases from 206 kJ/mol to 188, 170 and 157 kJ/mol, respectively. With the mass fraction of AP increases from 0 to 60%, the detonation velocity and heat of explosion increase from 5390 m/s to 8315 m/s and from 1610 kJ/kg to 5396 kJ/kg, respectively. As the particle size of AP decreases, the detonation velocity increases to 5863, 5902 and 5931 m/s, respectively, while there is no significant impact on the heat of explosion.