Experimental insight into interaction mechanism of guanidinium-5-aminotetrazole (GA) and nitrocellulose

5-Amino-1H-tetrazole (5-ATZ), an environmentally friendly energy-containing material for new propellants, is gradually applied in high-energy propellants and its ionic salt compounds have received wide attention. This study focused on investigating the interaction mechanism of guanidinium-5-aminotetrazole (GA) and nitrocellulose (NC) by kinetic methods and TG-DSC-FTIR analysis. DSC and TG experiments indicated that there was a certain interaction during the pyrolysis process of NC and GA. Comparing the kinetic models of NC and peak 3 in NC-GA, it can be found that the addition of GA mainly affected the m-value and contribution in the second step B -> C, and the mechanism function changed from Fn to Cn,m. TG-DSC-FTIR experiments indicated that the initial decomposition product of NC, NO2, participated in the thermal decomposition process of GA, and the two reacted chemically to form CO, N2O, which made NO2 unable to completely oxidize the skeleton of NC to produce CH2O, HCOOH.

Automated summary

This study investigates the interaction mechanism between 5-amino-1H-tetrazole and nitrocellulose using kinetic methods and thermal analysis. The results show that the addition of 5-amino-1H-tetrazole affects the pyrolysis process of nitrocellulose and leads to the formation of incomplete oxidation products.