CL-20基爆炸网络装药的UV光辅助直写成型及性能

为了提高爆炸网络装药效率和成型效率、改善装药能量性能,以高能叠氮胶3,3-二叠氮甲基氧丁环-四氢呋喃共聚醚(PBT)和紫外光(UV)固化树脂为复合粘结剂、以CL-20为主体炸药,设计了一种UV光辅助固化的CL-20基含能油墨,并采用3D打印平台装置对油墨进行了直写成型。采用流变仪、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、邵氏硬度仪等对成型复合物的流变性能、微观结构、晶型、硬度进行了表征和测试。结果表明,CL-20含量为82%时,油墨体系稳定性较好,采用UV光辅助固化的油墨固化速率快、成型样品表面平整,硬度为70 HA;撞击感度测试表明,复合物的特性落高比原料提高了20 cm;传爆性能测试表明,成型样品可实现90°拐角传爆,在1.2 mm装药宽度下,其传爆临界尺寸为0.387 mm。

Direct Writing Prototyping with Ultraviolet and Performance of CL-20 Based Explosive Network Charging

In order to improve the efficiency of charging and molding of the explosive network,as well as the energy performance,high-energy azide binder 3,3-diazide methyl oxetane-tetrahydrofuran copolymer(PBT),ultraviolet(UV)curing acrylate and hexanitrohexaazaisowurtzitane(CL-20)were selected as bonding system and main explosive respectively,an ultraviolet assisted curing CL-20-based energetic ink was designed,and using a 3D printing device to write.Rheometer,scanning electron microscope(SEM),X-ray diffractometer(XRD),and shore durometer were employed to characterize and test the rheological properties,microstructure,crystal form and hardness of the molded composite.Results show that the ink system is stable when the content of CL-20 is 82%.The curing efficiency of ink is fast with UV assisting,and the surface of molded sample is smooth.The hardness is 70 HA.The special height of impact sensitivity of the composite is 20 cm higher than the raw material;the test of detonation performance shows that the detonation wave can transfer 90°corner,and the critical detonation size reaches 0.387 mm when the line width of charge is 1.2 mm.