Application of 1,1-Diamino-2,2-dinitroethene (FOX-7, DADNE) in a Thermobaric Explosive Composition (TBX) with Reduced Sensitivity to Mechanical Stimuli

The present study aimed to verify the potential of 1,1-diamino-2,2dnitroethene (FOX-7) in a Thermobaric Explosive Composition (TBX).Samples based on FOX-7, hexogen, octogen and pentrite phlegmatised with wax, and with the addition of aluminium-silicon (Al:Si) alloy powder were subjected to stimulus sensitivity tests, and the blast wave characteristics, quasi-static pressure at constant volume (QSP), the heat of explosion and detonation velocity were measured.A method for determining the heat of explosion (11.4 kJ) of the detonator used to initiate the blast by calorimetric heat measurement was proposed and positively verified.Compared to RDX or HMX, the FOX-7-based composition was twice as insensitive to excitation stimuli such as friction and impact (330 N and 10 J, respectively).Except for the PETN-based mixture, the remaining samples ignited when heated above 210 C.In general, the explosive properties of the FOX-7 and Al:Si mixture were the weakest compared to the other explosives tested, but the parameters important to the thermobaric process, such as the overpressure wave impulse and QSP, were relatively high and satisfactory.The results of the thermochemical calculations correspond essentially to the experimental ones.