Effects of Nanosized Metals and Metal Oxides on the Thermal Behaviors of Insensitive High Energetic Compound ICM-102

In this paper, the composites of a newly insensitive high explosive 2,4,6-triamino-5-nitropyrimidine-1,3-dioxide (ICM-102) with nanosized metals (Al, Co, Mg, Si, Ti, and Zr) and nanosized metal oxides (CuO and Fe₂O₃) have been prepared and investigated in terms of thermal reactivity. The catalytic effects on the thermal decomposition of ICM-102 composites have been investigated by TGA-DSC technique. Among all the composites, ICM-102/Co shows the minimum residue rate of 1.57 wt % and ICM-102/Si shows the maximum heat release of 1001.9 J g^-1. The kinetic parameters for the catalytic decomposition of ICM-102 have been obtained. The activation energy (E_a) of ICM-102 decomposition is within 197.9-212.0 kJ mol^-1. Compared with ICM-102, the E_a of ICM-102/Si decomposition was decreased by about 90 kJ mol^-1. The decomposition gaseous products of ICM-102 and its composites have been analyzed by the TG-MS technique. It has been shown that the main gaseous products are H₂O, C₂H₄, C₃, and C₂N or C₃H₂. The ICM-102 decomposition undergoes intramolecular dehydration, followed by two different ring-opening chemical pathways. The decomposition products are largely dependent on the type of additives.