高聚物添加剂对B炸药撞击感度和作功能力的影响

为研究添加剂对B炸药撞击感度和作功能力的影响,分别添加123树脂、聚酯纤维和热塑性弹性体VP-401制备改性B炸药。进行了样品的大药片撞击感度试验、苏珊试验和圆筒试验,获得改性B炸药的撞击感度和作功能力变化。讨论了压缩弹性和韧性对改性B炸药撞击感度的影响,以及添加剂含量对作功能力的影响。结果表明,加入1%的123树脂能显著改善B炸药压缩和拉伸的弹性及韧性,其爆炸反应阈值高度提高了3 m,撞击感度明显降低。加入123树脂的改性B炸药仍属于强度较低的炸药,在苏珊弹撞靶至破碎炸药爆炸前的几百微秒范围内,炸药随壳体发生塑性变形过程中已发生破碎,其破碎程度严重影响炸药的爆炸百分数,即相对释放能。与B炸药的作功能力比较,径向膨胀距离5 mm和19 mm处,添加1%123树脂的B炸药的作功能力分别降低了4.6%和1.24%。

Effect of Polymer Additives on Impact Sensitivity and Power of Composition B

To investigate the effect of additives on the impact sensitivity and power of Comp.B,modified Comp.B was prepared by adding 123 resin,polyester fibre and thermoplastic elastomer VP-401,respectively.Big-bill hammer impact sensivity test,Susan test and cylinder test of the samples were conducted.The changes in the impact sensitivitly and power of Comp.B were obtained.The effects of compressive elasticity and toughness on the impact sensitivity as well as content of additives on the power for modified Comp.B were discussed.Results show that by adding 1％ 123 resin,the compressive elasticity and toughness of Comp.B can be obviously improved,and the height of the threshold of deflagration reaction is enhanced by 3 m,and the impact sensitivity is obviously reduced.The modified Comp.B with 123 resin still belongs to a kind of explosive with lower strength,the fragmentation of the explosive has occured in the process of plastic deformation occured with the shell within the time range of several hundred microseconds from the Susan projectile's impact on the target to explosion of fragmentated explosive.The fragmentation degree of the explosive greatly affects the percentage of deflagration,i.e.the relative energy is released.Compared with the power capability of Comp.B,the power of Comp.B with 1％ 123 resin is decreased by 4.6％ and 1.24％,respectively at radial distance of 5 mm and 19 mm.