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首页> 外文期刊>RSC Advances >Investigation of the thermal decomposition and stability of energetic 1,2,4-triazole derivatives using a UV laser based pulsed photoacoustic technique
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Investigation of the thermal decomposition and stability of energetic 1,2,4-triazole derivatives using a UV laser based pulsed photoacoustic technique

机译：基于紫外激光的脉冲光声技术研究高能1,2,4-三唑衍生物的热分解和稳定性

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摘要

This paper is in continuation of our previous report which was based on a 532 nm wavelength pulsed photoacoustic (PA) technique with nitro rich energetic materials named 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) in the 30-350 degrees C temperature range. In the present work, the PA fingerprint spectra, thermal stability and efficiency of these compounds as rocket fuel have been evaluated using the fourth harmonic i.e. 266 nm wavelength of 7 ns pulse duration and 10 Hz repetition rate as an excitation source. The entire study is based on the photodissociation process due to the pi* <- n electronic transition in NO2 molecules which is initiated inside the PA cell. The result obtained from the PA technique and thermogravimetric-differential thermal analysis (TG-DTA) data confirm the multistep decomposition mechanism. The study also provides the stable thermal quality factor "Q" which is linked to the stability of the compound.
机译：本文是我们先前报告的延续，该报告基于532 nm波长脉冲光声（PA）技术，使用了富含硝基的高能材料1-（4-甲基-3,5-二硝基苯基）-1H-1,2,4 -三唑（p-Me-DNPT），1-（4-甲氧基-3,5-二硝基苯基）-1H-1,2,4-三唑（p-OMe-DNPT）和2,6-二硝基-4- （1H-1,2,4-三唑-1-基）苯胺（p-NH2-DNPT）在30-350摄氏度的温度范围内。在目前的工作中，已经使用四次谐波即7 ns脉冲持续时间的266 nm波长和10 Hz重复频率作为激发源，评估了这些化合物作为火箭燃料的PA指纹图谱，热稳定性和效率。整个研究基于光解离过程，这归因于PA细胞内部引发的NO2分子中pi * <-n电子跃迁。从PA技术和热重差热分析（​​TG-DTA）数据获得的结果证实了多步分解机理。该研究还提供了稳定的热品质因数“ Q”，该因数与化合物的稳定性有关。

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