Evaluation of thermal stability and acoustic fingerprint spectra of energetic 1,2,4-triazoles based on bond lengths of chemical substituents using pulsed photoacoustic technique
| Autor: | K.S. Rao, N. Kommu, Akhila K. Sahoo, A.K. Chaudhary |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
General Chemical Engineering Thermal decomposition Analytical chemistry Pulse duration Rocket propellant 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences Bond length Molecule Thermal stability 0210 nano-technology Thermal analysis |
| Zdroj: | RSC Advances. 6:4053-4062 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra21369j |
| Popis: | We investigated the effect of the bond lengths of the chemical substituents (attached to the para position of the phenyl ring) on the thermal stability of three newly synthesized nitro rich 1,2,4-triazoles, namely, 1-(4-methyl-3,5-dinitrophenyl)-1H-1,2,4-triazole (P-Me-DNPT), 1-(4-methoxy-3,5-dinitrophenyl)-1H-1,2,4-triazole (P-OMe-DNPT) and 2,6-dinitro-4-(1H-1,2,4-triazol-1-yl)aniline (P-NH2-DNPT). The thermal stability of these compounds was evaluated along with their acoustic fingerprint spectra between 30 and 350 °C, using a pulsed photoacoustic (PA) pyrolysis technique. A 532 nm wavelength of pulse duration 7 ns and repetition rate of 10 Hz, obtained from a Q-switched Nd:YAG laser, was used to determine the released NO2 molecules during the process of thermal decomposition. The thermo gravimetric-differential thermal analysis (TG-DTA) data along with PA results highlight the multistep decomposition mechanism of 1,2,4-triazoles. The study also helps us to distinguish the characteristic behavior of the reported molecules as propellants and explosives for rocket fuels. |
| Databáze: | OpenAIRE |
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