堵孔钝感高能叠氮硝胺发射药的性能

Performance of Plugged and Insensitive High-energy Azidonitramine Gun Propellant

为了解决高能叠氮硝胺发射药燃烧渐增性欠佳及低温感效果较差的问题,采用高分子复合材料堵孔和含能复合材料钝感的两步法工艺,制备了3种内孔被高分子复合材料形成的“塞子”封堵、表面被钝感的钝感高能叠氮硝胺发射药(本研究称之为堵孔钝感发射药)。采用爆热和密闭爆发器试验,研究了堵孔钝感发射药的能量性能及静态燃烧性能。结果表明,与空白药相比,随着堵孔材料及钝感材料含量的增加,3种堵孔钝感发射药WCBF-1/18、WCBF-2/18和WCBF-3/18的爆热分别下降2.6%、3.6%和4.3%,燃烧渐增性增强且燃烧渐增性因子Pr值由0.471分别提高到0.552、0.563和0.576。3种堵孔钝感发射药WCBF-1/18、WCBF-2/18和WCBF-3/18的高温相对燃烧活度温度系数的绝对值均值分别为2.87%、1.89%和1.56%,相较于空白药均有所下降,表明堵孔钝感发射药高常温区间内低温感效果好。

In order to improve the performance of burning progressivity and low temperature sensitive coefficient effect of high-energy azidonitramine gun propellant,three insensitive high-energy azidonitramine gun propellants was prepared by the two-stepprocess with polymer composite materials plugging and energetic composite materials desensitization”(called plugged and insensitive gun propellant in this study),whose inner hole was blocked by polymer composite materials and surface was desensitized.The energetic and static combustion performance of plugged and insensitive gun propellant was investigated by heat of explosion and closed-bomb tests.Results show that compared with the untreated gun propellant,with the increase of the content of plugged and insensitive materials,the heat of explosion of three types of plugged and insensitive gun propellants(WCBF-1/18,WCBF-2/18,WCBF-3/18)decrease by 2.6%,3.6%,4.3%,and Pr values increase from 0.471 to 0.552,0.563,0.576 respectively.The average absolute values of temperature coefficient of relative combustion activity at high temperature for three types of plugged and insensitive gun propellants WCBF-1/18,WCBF-2/18,WCBF-3/18 are 2.87%,1.89%,1.56%,respectively,which are all lower than that of untreated gun propellant,it shows that the low temperature sensitivity coefficient effect in the high and normal temperature ranges for plugged and insensitive gun propellant can be improved.