Thermal behavior, decomposition mechanism and thermal safety of 5,7-diamino-4,6-dinitrobenzenfuroxan (CL-14)

Abstract

Thermal decomposition kinetics and mechanism of the high-energetic material 5,7-diamino-4,6-dinitrobenzenfuroxan (CL-14) were determined by differential scanning calorimetry (DSC), rapid scanning Fourier transform infrared spectroscopy, and simultaneous thermogravimetric and DSC analyses, coupled with FT-IR and mass spectroscopy. To evaluate the thermal safety of 5,7-diamino-4,6-dinitrobenzenfuroxan (CL-14), its specific heat capacity (C p) was measured by DSC, and thermal conductivity (λ) was estimated. Kinetic parameters and heat of exothermic decomposition reaction of CL-14 were obtained by analysis of DSC curves. Kinetic parameters used to evaluate the thermal safety of CL-14, such as self-accelerating decomposition temperature (T SADT), critical temperature of thermal explosion (T b) and impact sensitivity (H 50), were obtained. Results showed that for CL-14, T SADT = 282.0 °C and T b = 307.9 °C, whereas H 50 = 39.79 cm, revealing that CL-14 had better thermal safety and heat resistance than HMX, RDX and GNTO.