【摘要】 将奥克托今(HMX)溶于二甲基亚砜(DMSO)中,获得HMX/DMSO络合物晶体,再将其分别加入蒸馏水和含聚乙烯吡咯烷酮(PVP)的溶液中,制备了A类多孔网状HMX(PHMX-A)和B类多孔网状HMX(PHMX-B)。用扫描电子显微镜(SEM)、X射线粉末衍射仪(XRD)、压汞分析仪及TG-DSC热分析仪对多孔网状HMX进行了表征。结果表明:多孔网状HMX由众多的孔和均匀连续的骨架构成,具有高的比表面积和孔隙率。PHMX-A全部为型晶体,其比表面积为5.3m2·g-1,平均孔径为501nm,孔隙率为56.1%;而PHMX-B有80%为型晶体,含少量的γ型晶体,其比表面积为19.0m2·g-1,平均孔径为75nm,孔隙率为37.2%。与HMX原料相比,PHMX-A和PHMX-B的相转变温度分别提前了2.8℃和17.5℃,其热分解温度分别提前了0.3℃和1.3℃,而其热失重开始温度分别提前了4℃和14℃。更多还原

【Abstract】 Two types of porous reticular HMX,PHMX-A and PHMX-B,were prepared by adding octogen(HMX)/dimethylsulfoxide(DMSO)complex,which was obtained by mixing HMX and DMSO,into pure distilled water or the solution containing polyvinyl pyrrolidone.Their structures were characterized by scanning electron microscope,X-Ray diffraction,mercury pressure method and thermogravimetry-differential scanning calorimetry.Results show that both porous reticular HMXs are consist of homogeneous continuous skeleton and many pores,and have high specific surface area and porosity.PHMX-A is absolutely-type crystal,while PHMX-B contains a littleγ-type crystal.The SSAs for PHMX-A and PHMX-B are 5.3 m2·g-1 and19.0m2·g-1,the mean pore diameters are501 nm and 75 nm,and the porosities are 56.1% and 37.2%,respectively.The phase inversion temperature,thermal decomposition temperature and initial decomposition temperatures for PHMX-A and PHMX-B compared with those of raw HMX,are all advanced by2.8 ℃ and 17.5 ℃,0.3 ℃ and 1.3 ℃,4 ℃ and 14 ℃,respectively.更多还原