Burning behaviour of energetic ionic liquids investigated with-4-amino-1-methyl-1,2,4-triazolumnitrat

4-Amino-1-methyl-1,2,4-triazoliumnitrat (C1 N or AMTN) is a typical representative of energetic ionic liquids, which can be produced in technical scale. It was used as a model substance to investigate the decomposition and high-pressure burning behavior under inert test conditions. Thermoanalytical studies indicate a complex exothermic decomposition process with at least four overlapping main reaction steps from 480 K to 540 K. After complete gasification at 540 K N2O, CO, H2O, HCN and NH3 were identified as decomposition products by FTIR-analysis. The burning behavior was investigated in a window bomb as a function of pressure and initial temperature. The pure C1 N could only be ignited above 10 MPa. Then it burns with a linear progression rate between 6 and 9 mm/s without significant dependency on pressure and on initial temperature. A hot solid or gelatinous reaction zone of about 1 mm thickness was detected at the burning surface of the EIL. In NIR-emission spectra from the flame zone, strong bands related to primary and secondary amines and amides were detected. The visual and spectral investigations reveal a qualitative explanation of the pressure independence.