包覆对新型炸药2,6-二氨基-3,5-二硝基吡啶-1-氧化物某些性能的影响

Effect of Coating on Some Properties of a New Explosive 2,6-Diamino-3,5-dinitropyridine-1-oxide

采用溶液-水悬浮-蒸馏法,以氟橡胶F2311和丁腈橡胶(NBR)包覆2,6-二氨基-3,5-二硝基吡啶-1-氧化物(ANPyO),利用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、差示扫描量热法(DSC)、热重分析法(TG)和感度试验表征包覆前后ANPyO的结构和性能。试验结果表明,用F2311和NBR包覆后的ANPyO热分解峰值温度分别下降了8.3℃和7.8℃,分解热分别提高了282.4J.g-1和41.5J.g-1。包覆后颗粒变大。红外光谱中N—H特征峰分别红移了2cm-1和3.9cm-1至3280.6cm-1和3367.4cm-1,氮杂原子的特征峰红移了5.8cm-1至1232.4cm-1。撞击感度由16%分别下降为14%和10%,摩擦感度由30%分别下降为26%和28%。通过对F2311和NBR包覆后ANPyO结构和性质的分析,包覆对ANPyO有一定的降感作用。

2,6-Diamino-3,5-dinitropyridine-l-oxide （ANPyO） was coated with fluorine rubber F2311 and nitrile-butadiene rubber （NBR） by means of solution-water suspending-distillation method. The structures and properties of ANPyO and coated samples were characterized by Fourier transform infrared spectroscopy （FTIR）, scanning electron microscope （SEM）, differential scanning calorimetry （DSC）, thermograimetry （TG）, and impact and friction sensitivity tests. Results show that the decomposition peak temperatures of coated ANPyO are decreased by 8.3℃ and 7.8℃ , and decomposition heats of coated ANPyO are increased by 282.4 J · g^-1 and 41.5 J · g^-1, and the particles of coated ANPyO become bigger. In FTIR spectra, N-H spectral characteristic absorption bands have 2 cm^-1 and 3.9 cm ^-1red shifts to 3280.6 cm^-1 and 3367.4 cm ^-1 respectively, and nitrogen atom in pyridine spectral characteristic absorption band has a 5.8 cm^-1 red shift to 1232.4 cm^-1. The impact sensitivity of coated ANPyO decreases from 16% to 14% and 10% , and the friction sensitivity decreases from 30% to 26% and 28% , respectively.