Theoretical and experimental studies on thermostatic explosion behavior of typical melting and casting explosive 2,4-dinitroanisole (DNAN)

With the advantages of 2,4-dinitroanisole based melt-cast explosives (DNAN-based MCEs), such as low sensitivity, low shrinkage rate, and environmental friendliness, their use as a replacement for trinitrotoluene (TNT) for fabrication of melt-cast explosives has received considerable attention. Therefore, it is significant to explore the thermal safety performance of DNAN-based MCEs (DNAN/HMX/Al 30/40/30) to provide references for their production, storage, and transportation. A combination of DSC and ARC was employed to investigate the thermostatic explosion behavior of DNAN/HMX/Al MCEs in this study. As a result, it was shown that two calorimetry methods could produce different thermodynamic explosion behavior parameters, contributing to the differences in the mass and heat transfer properties. Then a calibration model considering the mass, shape, and heat convection was developed for thermostatic explosion behavior prediction, which can explain the predicted deviations reasonably. At last, the new method has been verified by slow cooking-off experiments that the SADT calculated by the kinetic parameters of the ARC test is more in line with the actual situation of DNAN-based MCE.