Decomposition Deflagration

The results of a number of tests such as those described in Chapter 2 led to classifications for the peroxide group. These tests included the determination of the hazards of decomposition (deflagration and detonation), bum rate, fire hazard, and reactivity hazards. Five different classes were formulated, as listed in the NFPA 43B Hazard Class, from the test results. Emergency procedures have been established for these five classes. 

Table II. HMX Pyrolytic Decomposition/Deflagration KDIE Values ...

Figure 5. Isothermal rapid pyrolytic decomposition/deflagration curve of HMX and HMX-ds.3...

Sample confinement apparently represents one external boundary condition that directly influences the predominant HMX physical state present during a given energetic process or event this in turn, dictates the rate—controlling mechanistic step. It appears there is a mechanistic correlation with the KDIE-determined rate-controlling steps observed in the ambient pressure, slow thermochemical decomposition process with both the rapid pyrolytic decomposition/deflagration process and the thermal explosion event. TUs causes one to wonder if a correlation exists between the high pressure combustion event and the ambient pressure thermochemical decomposition process. 

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