热塑性弹性体改性B炸药的性能研究

添加2%热塑性弹性体401和501对B炸药改性,得到改性后炸药MB-1和MB-2,测试了二者的力学性能和落锤撞击感度,分别用经验法和VLWR程序计算了二者的爆轰性能。结果表明,MB-1和MB-2的弹性和韧性均好于B炸药;在低速(100-1500s-1)冲击下,MB-2的韧性比MB-1好。大药片落锤撞击感度试验中,MB-1和MB-2的爆炸反应阈值高度分别为3.5-4m和6-6.5m,MB-1的撞击感度比MB-2高。与B炸药相比,MB-1和MB-2的爆速分别降低了0.104mm·μs-1和0.099mm·μs-1,爆压分别降低了1.3GPa和1.2GPa。

Performance of Modified Composition B with Thermoplastic Elastomer

Comp.B was modified by adding 2% thermoplastic elastomer 401 and 501. For the MB-1 and MB-2 of modified Comp.B, mechanical properties and drop hammer impact sensitivity were tested, detonation performance was calculated by using experience method and VLWR code. Results show that the elasticity and toughness of the MB-1 and MB-2 were better than that of Comp.B, the toughness of MB-2 were better than that of MB-1 in low speed impact experiment. In drop hammer impact test of big-bill explosives, the threshold heights of ignition for the MB-1 was 3.5 m to 4 m, for MB-2 it was 6 m to 6.5 m. The impact sensitivity of MB-1 was higher than that of MB-2. Compared with Comp.B, the CJ velocities of the MB-1 and MB-2 decrease by about 0.104 mm·μs-1 and 0.099 mm·μs-1, respectively; the CJ pressures of the MB-1 and MB-2 decrease by about 1.3 GPa and 1.2 GPa, respectively.