1 / 2018-03-21 23:18:43

Effect of Nano-Al on Thermal Decomposition Characteristics and Sensitivities of 1,1-diamino-2,2-dinitroethene based plastic-bonded explosive

Nano-Al; FOX-7 based Plastic bond explosive; Thermal decomposition characteristics; Sensitivities

To study the effect of nano-Al on thermal decomposition characteristics and sensitivities of 1,1-diamino-2,2-dinitroethene (FOX-7) based plastic-bonded explosive (PBX), Two kinds of FOX-7 based PBX were prepared containing micro-Al and nano-Al respectively. Kinetic parameters of decomposition for two kinds of FOX-7 based PBX were analyzed by a TG-DSC simultaneous thermal analyzer, and their impact sensitivity and friction sensitivity were tested according to GJB772A—1997. Results show that the thermal decomposition initial temperature is 226 ℃ and activation energy is 412.5 kJ•mol-1 for the PBX containing micro-Al, and the thermal decomposition initial temperature is 222 ℃ and activation energy is 327.4 kJ•mol-1 for the PBX containing nano-Al. Impact sensitivity H50 of PBX containing nano-Al is 75.7 cm, decreasing by 36.8 cm comparing with the PBX containing micro-Al. Friction sensitivity of PBX containing nano-Al has a increase of 8 % compared to PBX containing micro-Al.