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Volume 40 Issue 5
May. 2026
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Chinese Journal of High Pressure Physics  > 2026  >  40(5): 050108.
LIU Kun, TANG Jiupeng, WANG Qiang. Detonation Performance and Equation of State of Low Density Explosive Mixed by PBX-9502 Powder and 502 Glue[J]. Chinese Journal of High Pressure Physics, 2026, 40(5): 050108. doi: 10.11858/gywlxb.20251175
Citation: LIU Kun, TANG Jiupeng, WANG Qiang. Detonation Performance and Equation of State of Low Density Explosive Mixed by PBX-9502 Powder and 502 Glue[J]. Chinese Journal of High Pressure Physics, 2026, 40(5): 050108. doi: 10.11858/gywlxb.20251175
shu

Detonation Performance and Equation of State of Low Density Explosive Mixed by PBX-9502 Powder and 502 Glue

doi: 10.11858/gywlxb.20251175
  • 1.

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

  • 2.

    State Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

  • Received Date: 28 Aug 2025
  • Rev Recd Date: 17 Nov 2025
    • Available Online: 10 Dec 2025
  • Issue Publish Date: 05 May 2026
    Abstract
  • This study focuses on the detonation performance and equation of state (EOS) of a low-density composite explosive mixed in a certain proportion of PBX-9502 powder and 502 glue. The theoretical analysis method was used based on the BKW program. The main work includes calculating the heat of formation of Kel-F (PBX-9502 binder) and ethyl cyanoacrylate (main component of 502 glue) using the group contribution method, determining the standard entropy temperature coefficient and excess volume of 18 product gases containing F and Cl elements. Within the BKW program framework, the CJ detonation velocity and pressure were determined for five mixing ratios and four density states. The corresponding JWL equation of state parameters are fitted based on the calculated CJ isentropic line. The results show that the detonation velocity and pressure are positively correlated with initial density, but negatively correlated with the content of 502 glue. The relevant results provide a theoretical basis for the selection of 502 glue ratio and mixed charge density in practical applications. The obtained JWL EOS parameters can also be used by general detonation calculation software to evaluate the detonation performance of devices. The relevant method can also be directly extended to the study of detonation parameters of other formulated explosives (sulfur, aluminum), which has important engineering application value.

     

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