CL-20基复合含能材料的制备及性能

为了提高2,4,6,8,10,12-六硝基-2,4,6,8,10,12-六氮杂异伍兹烷(CL-20)的安全性能,以硝化棉(NC)和聚叠氮缩水甘油醚(GAP)为复合包覆剂,采用水悬浮法对CL-20进行表面包覆。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)和差示扫描量热仪(DSC)对样品的形貌、晶型和热分解性能进行表征,对包覆前后样品的撞击感度和力学性能进行了测试和分析。结果表明,NC和GAP成功包覆在CL-20的表面,所得CL-20/NC/GAP样品颗粒为类球形,中值粒径约为300μm。XRD结果表明,经过细化和包覆后,CL-20晶型没有变化,依然为ε型CL-20。特性落高由包覆前的17.3 cm和29.46 cm升高到了36.74 cm,力学性能也显著提高。DSC结果表明,与未包覆CL-20相比,CL-20/NC/GAP复合粒子的分解峰温、活化能、爆炸临界温度和自加速分解温度都得到了一定程度的提高。

Preparation and properties of CL-20 based composite energetic material

To improve the safety of CL-20,the adhesives of nitrocellulose(NC) and glycidyl azide polymer(GAP) were used to coat CL-20 via a solvent-slurry method.Scanning electron microscopy(SEM),X-ray diffraction(XRD) and differential scanning calorimetry (DSC) were employed to characterize the morphology,crystal form and thermal decomposition properties of the samples,respectively.And the impact sensitivity and mechanical properties of samples were also measured and analyzed.The research results show that NC and GAP modified CL-20 composite is prepared successfully,which presents agglomerate with mean diameter of 300 μm.The XRD results show that the crystal type is unchanged.The drop height of raw CL-20,refined CL-20 and CL-20/NC/GAP is 17.3 cm,29.46 cm and 36.74 cm,respectively,and the mechanical properties are improved.DSC results show that top temperature,activation energy,critical temperature and accelerating decomposition temperature of CL-20/NC/GAP sample is increased,compared with uncoated samples.