采用加速老化试验方法,研究了新型云爆剂在高温加速老化条件下的老化行为,并对其使用寿命进行预估.结果表明,随老化时间的增加,新型云爆剂密度均匀性明显降低,而交联密度值呈现先减小后增大再减小的趋势,且老化温度越高,交联密度峰值越大.在55、65、75和 85℃老化温度下,样品交联密度的最大值分别为3.0843×10-5、3.0932×10-5、3.1964×10-5、3.2881×10-5mol/mL.以铝粉活性降低8%作为新型云爆剂的失效判据进行寿命预估时, 推算新型云爆剂在25℃下的使用寿命大于14年.%The aging behavior of new-type fuel air explosives (FAE) under the high temperature accelerated aging condition was studied by an accelerated aging test method and the service life of FAE was predicted.The results show that with increasing the aging time, the density uniformity of new-type FAE decreases significantly, whereas crosslink density shows the trend of first decreasing, then increasing and decreasing again, and the higher the aging temperature, the bigger the crosslink density.Maximum values of the crosslink density of samples at aging temperatures of 55, 65, 75 and 85℃ are 3.0843×10-5, 3.0932×10-5, 3.1964×10-5 and 3.2881×10-5mol/mL, respectively.When estimating the service life of new-type FAE using the active aluminum content decrease of 8% as a failure criterion, the calculated value of service life at 25℃ is more than 14 years.
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