Consequently, it was anticipated that the decomposition temperatures of the mAC obtained from those four particle sizes would be comparable as well. The TGA thermograms suggested that decomposition of the azodicarbonamide occurred
over two stages, the first stage took place over the range form 180–220 C, generating carbon monoxide gas, nitrogen gas and urea. The second stage of decomposition was found over a much broader temperature range of 220–320 C. This was associated with the evolution of ammonia gas and the generation of solid isocyanic acid residue from urea.