Non-isothermal decomposition kinetics, heat capacity and thermal safety of 37.2/44/16/2.2/0.2/0.4-GAP/CL-20/Al/N-100/PCA/auxiliaries mixture

Abstract: The specific heat capacity (C p) of 37.2/44/16/2.2/0.2/0.4-GAP/CL-20/Al/N-100/PCA/auxiliaries mixture was determined with the continuous C p mode of microcalorimeter. The equation of C p with temperature was obtained. The standard molar heat capacity of GAP/CL-20/Al/N-100/PCA/auxiliaries mixture was 1.225Jmol−1 K−1 at 298.15K. With the help of the peak temperature (T p) from the non-isothermal DTG curves of the mixture at different heating rates (β), the apparent activation energy (Ek and Eo) and pre-exponential constant (A K) of thermal decomposition reaction obtained by Kissinger''s method and Ozawa''s method. Using density (ρ) and thermal conductivity (λ), the decomposition heat (Q d, taking half-explosion heat), Zhang-Hu-Xie-Li''s formula, the values (T e0 and T p0) of T e and T p corresponding to β →0, thermal explosion temperature (T be and T bp), adiabatic time-to-explosion (t TIad), 50% drop height (H 50) of impact sensitivity, and critical temperature of hot-spot initiation (T cr,hot spot) of thermal explosion of the mixture were calculated. The following results of evaluating the thermal safety of the mixture were obtained: T be =441.64K, T bp =461.66K, t Tlad =78.0s (n =2), t Tlad =74.87s (n =1), t Tlad =71.85s (n =0), H 50 =21.33cm. [Copyright &y& Elsevier]