Stability of N-LTNR exposing to severe thermal stimulus
摘要
The thermal stability of normal lead styphnate( N-LTNR) has been studied under severe temperature(- 70 ℃- 130 ℃ for 5 days) with a high optical microscope and camera were used to observe apparent morphology and thermal gravimetric analysis was applied to study the physical changes. In addition,vacuum stability analysis,differential scanning calorimetry( DSC),thermal gravimetric analysis( TGA) and purity analysis were utilized to study the chemical changes. As well as flame sensitivity analysis were used to investigated the explosive changes. The results show that N-LTNR has good chemical stability and fire function stability between- 70 ℃ and 130 ℃,but poor physical stability. When the temperature was exceeded than 110 ℃,the N-LTNR lost crystal water which made the energetic material become darker in color,lager in volume and lighter in weight( 3. 416%) when the temperature was below- 40 ℃,the phenomenon of crystal broking and jumping happened.