Investigation on thermal kinetic behavior of 5 aminotetrazole/sodium periodate gas generator.

This study presents the design of a gas-generating formulation with a stoichiometric 5-aminotetrazole/sodium periodate. TG-FTIR-MS analysis was used to investigate the thermal decomposition behavior of the gas generator. The thermal kinetic parameters were calculated by non-isothermal kinetic methods to gain insight into the reaction mechanism. The results of this study demonstrate a distinct decomposition process for this gas-generating agent compared to conventional 5AT-based formulations. Specifically, it eliminates the formation of melamine through deamination polymerization and subsequent deamination polymerization processes, directly decomposing into amino cyanic acid (NHCN), hydrogen cyanide (HCN), ammonia (NH), and nitrogen gas (N). Kinetic calculations were performed using model-free methods and model-fitting methods. With the addition of NaIO, the decomposition activation energy of the first stage was reduced to 180 kJ/mol by 100 kJ/mol, making the decomposition of 5AT easier. The reaction process in the first stage followed a reaction order model of F3/2. The results of this study contribute to better understanding of the thermal kinetics and reaction mechanism of 5AT/NaIO system, which is significant for improving the decomposition efficiency of 5AT and for gas generator design.