Abstract:Two general expressions and their six derived formulae for estimating the critical temperature (Tb) of thermal explosion for energetic materials (EMs) are derived from the Semenov′s thermal explosion theory and eight non-isothermal kinetic equations, using reasonable hypothesis. The initial temperature (T0i) at which DSC curve deviates from the baseline,the onset temperature (Tei), the kinetic parameters of exothermic decomposition reaction can be obtained from the non-isothermal DSC curve of EMs. The values of T00 and Te0 was obtained from the equation T0i or ei = T00 or e0 + a1 βi + a2 βi2 +…+aL-2βiL-2,i=1,2,…, L and then the values of Tb was calculated by the six derived formulae. The Tb results obtained with the six derived formulae for 1, 4, 5, 8-tertanitro-1,4,5,8-tetraazadifurazano[3,4-c:3′,4′-h] decalin and its parent compound, 1,3,4-trinitro-imidazolonone[4,5-b] furazano[3,4-e] piperazine and its parent compound, 1,3,4,8-tetranitro-imidazolinone[4,5-b] furazano[3,4-e] piperazine, 1,4,5,8- tetranitro -1,4,5,8-tetrazafurazano[3,4-b] decalin and 1,3,5-trinitro-1,3,5-triazafurazano[3,4-f] cycloheptane approximate well to each other.