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<p>The successful synthesis of <i>cyclo</i>-N<sub>5</sub><sup>−</sup> represents a significant breakthrough in the field of energetic materials. As a nonmetal pentazolate salt, N<sub>2</sub>H<sub>5</sub>N<sub>5</sub> exhibits high detonation velocity, high specific impulse, and high nitrogen content, making it highly promising for applications in explosives and propellants. This study aims to explore the thermal stability, thermal decomposition behavior, and compatibility of N<sub>2</sub>H<sub>5</sub>N<sub>5</sub> with 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX), 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaza-isowurtzitane (CL-20), ammonium perchlorate (AP), hydroxy-terminated polybutadiene (HTPB), Mg, and Al. The results demonstrate that the decomposition rate of N<sub>2</sub>H<sub>5</sub>N<sub>5</sub> is directly proportional to temperature and inversely proportional to pressure. High-temperature and low-pressure environments are detrimental to the storage of N<sub>2</sub>H<sub>5</sub>N<sub>5</sub>. VST testing reveals that N<sub>2</sub>H<sub>5</sub>N<sub>5</sub> is compatible with RDX, HMX, AP, HTPB, Mg, and Al. Furthermore, DSC results indicate that N<sub>2</sub>H<sub>5</sub>N<sub>5</sub> exhibits compatibility level A with HMX, HTPB, Mg, and Al, compatibility level B with RDX and CL-20, and compatibility level D with AP. In addition, the kinetics parameters of various systems were investigated using the Ozawa, Kissinger, and ASTM E698 methods. It is found that the apparent activation energies obtained from the Ozawa and Kissinger methods demonstrate good consistency.</p>

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Thermal stability and compatibility study of N2H5N5

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Xiang Chen,
  • Chenguang Zhu,
  • Bingcheng Hu,
  • Chong Zhang

摘要

The successful synthesis of cyclo-N5− represents a significant breakthrough in the field of energetic materials. As a nonmetal pentazolate salt, N2H5N5 exhibits high detonation velocity, high specific impulse, and high nitrogen content, making it highly promising for applications in explosives and propellants. This study aims to explore the thermal stability, thermal decomposition behavior, and compatibility of N2H5N5 with 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX), 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaza-isowurtzitane (CL-20), ammonium perchlorate (AP), hydroxy-terminated polybutadiene (HTPB), Mg, and Al. The results demonstrate that the decomposition rate of N2H5N5 is directly proportional to temperature and inversely proportional to pressure. High-temperature and low-pressure environments are detrimental to the storage of N2H5N5. VST testing reveals that N2H5N5 is compatible with RDX, HMX, AP, HTPB, Mg, and Al. Furthermore, DSC results indicate that N2H5N5 exhibits compatibility level A with HMX, HTPB, Mg, and Al, compatibility level B with RDX and CL-20, and compatibility level D with AP. In addition, the kinetics parameters of various systems were investigated using the Ozawa, Kissinger, and ASTM E698 methods. It is found that the apparent activation energies obtained from the Ozawa and Kissinger methods demonstrate good consistency.