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采用差示扫描量热(DSC)分析技术,研究了N-氧化3’3-偶氮双(6-氨基-1,2,4,5-四嗪)(DAATO3.5)在常压下的热分解特性;选择了7种推进剂用典型铅铜催化剂,研究了催化剂与DAATO3.5不同配比时,其对DAATO3.5催化热分解行为的影响。结果表明,DAATO3.5在240~257℃的温度区间内有一个激烈的放热分解过程,对应一个尖锐的放热分解峰,峰温为(250±0.5)℃,分解放热量为3 088 J/g。DAATO3.5与所选铅铜盐的作用结果显示,NTO-Cu、CuO、CuBT及NTO-Pb、PbO、PbBT使DAATO3.5的分解峰温有所升高,使DAATO3.5分解放热量有一定幅度的降低。PbSt可使DAATO3.5的分解峰温明显降低,但同时也使DAATO3.5的分解峰明显变缓,分解放热区间显著拉宽,并导致DAATO3.5的分解放热量出现较大幅度降低。
The oxidation of 3’3-azobis (6-amino-1,2,4,5-tetrazine) (DAATO3.5) was studied under normal pressure using differential scanning calorimetry (DSC) The typical lead-copper catalysts of seven propellants were selected to study the effect of DAATO3.5 on the thermal decomposition of DAATO3.5 when the catalysts were mixed with DAATO3.5 in different proportions. The results show that DAATO3.5 has a strong exothermic decomposition at a temperature of 240 ~ 257 ℃, corresponding to a sharp exothermic decomposition peak with a peak temperature of (250 ± 0.5) ℃ and a decomposition heat of 3088 J / g. The results of DAATO3.5 and the selected lead and copper salts showed that NTO-Cu, CuO, CuBT, NTO-Pb, PbO and PbBT increased the decomposition peak temperature of DAATO3.5 and the heat of decomposition of DAATO3.5 A certain degree of reduction. PbSt can significantly reduce the decomposition temperature of DAATO3.5, but also slow down the decomposition peak of DAATO3.5 and broaden the decomposition exothermic interval significantly, leading to a more significant decrease of the heat of decomposition of DAATO3.5.