Thermal Decomposition Kinetics of HMX

Burnham, A K ; Weese, R K

Lawrence Livermore National Laboratory

关键词: Heat Flux;    Heating;    Pyrolysis;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Kinetics;   

DOI  :  10.2172/15009839
RP-ID  :  UCRL-TR-204262
RP-ID  :  W-7405-ENG-48
RP-ID  :  15009839

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来源: UNT Digital Library

【 摘 要 】

Nucleation-growth kinetic expressions are derived for thermal decomposition of HMX from a variety of types of data, including mass loss for isothermal and constant rate heating in an open pan, and heat flow for isothermal and constant rate heating in open and closed pans. Conditions are identified in which thermal runaway is small to nonexistent, which typically means temperatures less than 255 C and heating rates less than 1 C/min. Activation energies are typically in the 140 to 150 kJ/mol regime for open pan experiments and about 160 kJ/mol for sealed pan experiments. Our activation energies are about 10% lower than those derived from data supplied by the University of Utah, which we consider the best previous work. The reaction clearly displays more than one process, and most likely three processes, which are most clearly evident in open pan experiments. The reaction is accelerated for closed pan experiments, and one global reaction appears to fit the data well.