Thermal decomposition of aminonitrobenzodifuroxan

The thermal decomposition behavior of aminonitrobenzodifuroxan (CL-18) was studied by DSC, TG and FTIR. The results show that CL-18 does not fuse before its decomposition. Its decomposition takes place in solid state. At lower heating rate, the thermal decomposition of CL-18 consists of two exothermal reactions: (1) the decomposition reaction of nitro group and the ring opening reaction of one furoxan circle is at 198.1°C, and (2) the decomposition of relatively stable benzofuroxan circle residues is at 199.1°C. The activation energy of the two reactions is about 167.68 kJ/mol and 204.55 kJ/mol respectively. In the whole decomposition, nitrogen dioxide produced in decomposition takes oxidation and catalysis. Only one exothermic reaction takes place at higher heating rate.