The thermal behavior of the zinc complexes as a non-azide gas generant forsafer driving - Zn complexes of the carbohydrazide and semicarbazide

The thermal behavior was investigated for the Zn complexes of carbohydrazid e and semicarbazide with Sr(NO3)(2) and 10% CuO as the oxidizing agent. In both complexes, there was little difference in the various combustion chara cteristics. The combustion reactivity was relatively low compared with the case of using other oxidizing agents, such as KBrO3, etc. But the participa tion of CuO in the reaction was supposed to be different based on the analy sis of the combustion residue. As for the gas evolution behavior, the evolu tion of N-2, NH3, N2O, NOx and COx gases was confirmed upon ignition at 500 degrees C in both complexes (no H2O analysis). It was interesting that CO gas not evolved from the semicarbazide complex. It was clear that the combu stion reactivity and the gas evolution behavior vary in both complexes in s pite of the same skeleton and similar oxygen balance.