Synthesis and Thermal Behavior of 1,8-Dihydroxy-4,5-dinitroanthraquinone Manganese Salt

doi:10.1007/s40242-014-3521-4

Abstract

Abstract:

A novel energetic combustion catalyst, 1,8-dihydroxy-4,5-dinitroanthraquinone manganese salt (DHDNEMn), was synthesized by virtue of the metathesis reaction in a yield of 91%, and its structure was characterized by IR, element analysis and differential scanning calorimetry(DSC). The thermal decomposition reaction kine-tics was studied by means of different heating rate DSC. The results show that the apparent activation energy and pre-exponential factor of the exothermic decomposition reaction of DHDNEMn obtained by Kissinger's method are 162.3 kJ/mol and (1011.8 s^-1, respectively. The kinetic equation of major exothermic decomposition reaction of DHDNEMn is da/dt=10^11.8/β)(2/5)(1-α)[-in(1-α)]^3/5exp(-1.623×10⁵/RT). The entropy of activation(ΔS^≠), enthalpy of activation(ΔH^≠) and free energy of activation(ΔG^≠) of the first thermal decomposition are -24.49 J·mol^-1·K^-1, 185.20 kJ/mol and 199.29 kJ/mol(T=575.5 K), respectively. The self-accelerating decomposition temperature(T_SADT) and critical temperature of thermal explosion(T_b) are 562.9 and 580.0 K, respectively. The above-mentioned information on the thermal behavior is quite useful for analyzing and evaluating the stability and thermal safety of DHDNEMn.

Key words: Manganese salt of 1,8-dihydroxy-4,5-dinitroanthraquinone, Thermal behavior, Energetic combustion catalyst

WANG Yinglei, ZHAO Fengqi, JI Yueping, YI Jianhua, WANG Wei, XU Siyu, AN Ting, PEI Qing. Synthesis and Thermal Behavior of 1,8-Dihydroxy-4,5-dinitroanthraquinone Manganese Salt[J]. Chemical Research in Chinese Universities, 2014, 30(3): 468-471.

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