Hugoniot and Mie–Grüneisen equation of state of unreacted 2,4-dinitroanisole (DNAN)

2,4-dinitroanisole (DNAN) is an insensitive explosive with a low melting point. It is a good replacement for 2,4,6-trinitrotoluene (TNT) in melt-cast explosives. With the increasing use of DNAN-based explosives, the thermodynamic properties of DNAN are needed to model its responses. In this study, the Rankine–Hugoniot curve (or simply the Hugoniot) of DNAN was obtained using the pressure-comparing method. In the experiments, two manganin stress gauges were placed on the top surfaces of an explosive sample and a standard sample whose Hugoniot is known, which can minimize the effect on the experimental data of the explosive reacting. When a planar shock wave propagates simultaneously through both the explosive sample and the standard sample, the gauges record the pressures on the two surfaces. Combining paired data points from the two gauge data sets and the known Hugoniot of the standard sample gives the Hugoniot of DNAN. In addition, the Mie–Grüneisen equation of state was obtained by utilizing the Hugoniot as the reference curve.