Preparation and non-isothermal melting crystallization behavior of the lowest eutectic mixture of ANTA/DNP
摘要
The mixed system of 3-amino-2, 4, 6-trinitroanisole (ANTA)/3, 4-dinitropyrazole (DNP) was studied by DSC and phase diagram method. The lowest eutectic mixture of ANTA/DNP was characterized by FT-IR, XRD, mechanical sensitivity tests, and theoretical calculation. Its melting and crystallization behavior was studied by microcalorimetry. Results showed that the system formed the lowest eutectic mixture at a mass ratio of 30/70, with a eutectic temperature of 69.44 °C, and decomposition peak temperature of 219.88 °C. The friction sensitivity was greater than 360 N, the impact sensitivity was greater than 40 J, and its density (1.82 g·cm−3) and detonation velocity (7836 m·s−1) were higher than those of TNT. As the heating rate rises, so does the melting process’s temperature range. The addition of HMX and RDX results in a more uniform heat transmission process in the mixed system at low heating rates, which marginally enhances the melting process. Nevertheless, the cooling crystallization process changes to a low temperature as the cooling rate increases. In addition, the additives has a certain inhibitory influence on the eutectic’s crystallization process. The studies have shown that the crystallization rate of the lowest eutectic mixture increased with the increase in crystallinity. The lowest eutectic mixture possesses good thermal stability and detonation performance, and it can be a substitute for TNT.