DSC and TG/DTG were performed to investigate the thermal kinetic performance and thermal safety of 3,3'bis-oxadiazole-5,5'-bis-methylene dinitrate (BODN) under a non-isothermal condition. The results reveal that the thermal behavior of BODN can be divided into three stages including a melting endothermic process and two decomposition exothermic processes. The apparent activation energy (E) and pre-exponent parameters (A) of the first exothermic decomposition reaction are 147.45 kJ mol À 1 and 10 13.77 s À 1 , and its kinetic equation was obtained from the DSC curves. The self-accelerating decomposition temperatures (T SADT), thermal ignition temperatures (T TIT), and critical temperatures of the thermal explosion (T b) to evaluate its thermal stability and safety are 166.41°C, 178.09°C, and 204.47°C, respectively. The positive values of free energy of activation (ΔG ¼ 6 = 135.49 kJ mol À 1) indicate that the decomposition process of BODN must proceed under the heating condition.

A novel energetic material, Bifurazano [3,4-b: 3′,4′-f] furoxano [3″,4″-d] oxacyclo-heptatriene (BFFO), has been investigated regarding two aspects, namely its thermal decomposition and solidification characteristics. The DSC curves indicate that the peak temperature of BFFO decomposition process is 271.1 °C under the static pressure of 2 MPa and the volatility of BFFO at 120 °C is significantly lower than that of TNT, DNAN and DNTF. The solidification curve indicates that the solidification of BFFO is a basic linear uniform solidification process, which is obviously different from that of TNT, DNAN and DNTF. In addition, the facet of BFFO appears much smoother and fewer defects are observed in the solidified body after solidification via CT and SEM. The reduction in solidification defects also further improves the mechanical properties of BFFO, with significant improvements in compressive and tensile strength compared to DNTF, DNAN and TNT. In summary, BFFO is a potential melt-cast carrier explosive with excellent thermal stability, solidification characteristics and mechanical properties.

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