Decomposition Pathways Of The Nitrogen-Rich Energetic Materials BTT And DAAT Investigated By Evolved Gas Analysis

摘要

3,6-Bis(2H-tetrazol-5-yl)-1,2,4,5-tetrazine (BTT) and 3,3 '-azobis(6-amino-1,2,4,5- tetrazine) (DAAT) are nitrogen-rich substances considered as new components for energetic applications, e.g. gas generators. Therefore, the thermal decomposition behaviour of BTT and DAAT was thermoanalytically characterized. Both substances decompose at surprisingly high temperatures of > 200°C. The decomposition heats released belong to the highest ever measured for energetic materials under similar experimental conditions and are spread over a relatively narrow temperature range. The online monitoring of the decomposition gases reveals the decomposition pathway which is initiated by ring opening reactions of the tetrazole and tetrazine subunits. Subsequent reaction steps could be identified leading to a residue-free degradation of the C-N-backbone of BTT and DAAT.