Abstract
The self-accelerating decomposition temperature (TSADT), critical temperature of thermal explosion (Tb), adiabatic time to explosion (tTIad), 50% drop height of impact sensitivity (H50), critical temperature of hot spot initiation caused by impact (Tcr,hotspot), safety degree (Sd), critical thermal explosion ambient temperature (Tacr), and thermal explosion probability (PTE) of the gun propellant composed of triethyleneglycol dinitrate (TEGDN), nitroglycerin (NG), and nitrocellulose (NC) were studied. The results of thermal safety evaluation on the gun propellant were obtained: (1) T00 = 433.4 K, TSADT = Te0 = 441.1 K, Tb = Tbp0 = 468.4 K; (2) when Ek = 205.3 × 103 J mol −1 and Ak = 1020.62 s −1, tTIad = 48.3 s, H50 = 17.93 cm, Tcr, hotspot = 634.9 K; for a sphere sample, TS(T)max = 369.0K, Tacr = 364.2 K, Sd = 65.03%, PTE = 34.96%.
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