Abstract
A new nitrogen-rich energetic salt of bis-1-methylimidazole 1H,1′H-5,5′-bistetrazole-1,1′-diolate salt, (1-M)2BTO, was synthesized and characterized (FT-IR, 1H NMR, 13C NMR, elemental analysis, and X-ray single-crystal diffraction). Results indicated that (1-M)2BTO crystallizes in the triclinic space group P-1. The thermal decomposition behavior of (1-M)2BTO was determined by differential scanning calorimetry (DSC) and thermogravimetric tandem infrared spectroscopy. The decomposition peak temperature of (1-M)2BTO was 530 K, which suggested that the salt is strong heat resistance. The apparent activation energies were 130.56 kJ mol−1 (Kissinger’s method) and 132.50 kJ mol−1 (Ozawa’s method), respectively. The enthalpy of formation for the salt was calculated as 917.3 kJ mol−1. The detonation velocity and detonation pressure of (1-M)2BTO were 7448 m s−1 and 20.7 GPa, respectively, using the Kamlet-Jacobs equation. Furthermore, the sensitivity test results showed that its impact sensitivity is greater than 50 J and friction sensitivity is 180 N, indicating that it has a lower sensitivity.
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Acknowledgements
This work was supported by the financial support received from the Science Challenge Project (Project No. TZ2018004), the National Natural Science Foundation of China (Project No. 51372211), the China Academy of Engineering Physics Research Institute (Project No. 18zh0079) and Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional (Project No. 14tdfk05).
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Luo, L., Jin, B., Peng, R. et al. Preparation and characterization of nitrogen-rich bis-1-methylimidazole1H,1′H-5,5′-bistetrazole-1,1′-diolate energetic salt. J Therm Anal Calorim 135, 3005–3013 (2019). https://doi.org/10.1007/s10973-018-7481-7
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DOI: https://doi.org/10.1007/s10973-018-7481-7