Thermal Reactivity of Methylammonium Nitrates

Abstract

The reactivity of the mono‐, di‐ and trimethyl‐ammonium nitrates to heat has been studied using differential thermal analysis, thermogravimetry and mass spectral analysis. The decomposition temperature of these compounds increases in the order CH3NH3NO3 > (CH3)2NH2NO3 > (CH3)3NHNO3. The activation energies have been determined employing isothermal decomposition technique. Mass spectrometric investigation shows that the extent of decomposition increases with increasing substitution on the nitrogen atom. Possible reasons for such behaviour have been explored.

Thermal ignition behaviour of ammonium perchlorate in presence of fuel-rich compounds

“…Whereas carbon does not show any explicit peak up to 400 ~ the DTA of cellulose exhibits a complicated pattern, with a very small endotherm at 295 ~ and two exotherms at 368 ~ and 501 ~ which agrees fairly well with some of the values reported in the literature [14,15]. The DTA trace of TMAN displays two endotherms due to phase transitions, at 90 ~ and 126 ~ and a decomposition exotherm at 210 ~ whereas that of TMAP shows only a single exotherm at about 400 ~ thus agreeing with those reported [4,5]. Figure 2 presents some selected DTA traces of AP in the presence of a higher than critical concentration [2] of TMAP.…”

“…Tetramethylammonium perchlorate [4] and trimethylammonium nitrate [5] were prepared as described earlier and the purities of the samples were checked by comparing the DTA traces with those already reported. The carbon used in the present investigation was activated charcoal supplied by Sarabhai Chemicals.…”

“…Besides TMAP, therefore, we report here the ignition behaviour of AP in the presence of other fuels having widely differing physicochemical properties, as revealed by their DTA in air and nitrogen. The additives used in the present study include simple fuels such as carbon and cellulose, which do not decompose exothermically in a non-oxidizing atmosphere below 400 ~ and also a fuel-rich compound, trimethylammonium nitrate (TMAN), which melts and decomposes below the first exotherm of AP [5].…”

Preparation and Thermal Decomposition Behavior of High-energy Ionic Liquids Based on Ammonium Dinitramide and Amine Nitrates

“…[15][16][17][18][19][20][21] The decomposition of amine nitrates starts with dissociation to amines and nitric acid. [22][23][24] The unique m/z values for monomethylamine and monoethanolamine are 31 and 61, respectively. 25) Mass spectra of the gases evolved from ADN/MMAN and ADN/MEAN during the exothermic peak at 130-220 °C are provided in Fig.…”

Preparation, characterization and thermolysis of phenylenediammonium dinitrate salts

“…Nitrates are powerful oxidizing agents and decompose at elevated temperature to give oxygen as one of the major products [10][11][12][13]. Extensive studies have been made on the thermal properties of alkyl [14][15] and ring substituted arylammonium nitrates [1][2][3]. Recently, we have studied thermal decomposition of phenylenediammonium sulfates [16].…”