溶剂对FOX-7晶体相变和热性能的影响  

Effects of Solvent on Phase Transitions and Thermal Properties of FOX-7

作　　者：周诚[1] 黄靖伦[2] 王伯周[1,3] 张丽媛[2] 马卿[2] 李祥志[1] 

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]中国工程物理研究院化工材料研究所,四川绵阳621900 [3]氟氮化工资源高效开发与利用国家重点实验室,陕西西安710065

出　　处：《火炸药学报》2016年第4期19-22,共4页Chinese Journal of Explosives & Propellants

基　　金：总装备部重大专项资助(批准号:00401010202)

摘　　要：采用重结晶法在二甲基甲酰胺（DMF）/H2O、二甲基亚砜（DMS）O/H2O和N-甲基吡咯烷酮（NMP）/H2O等不同溶剂体系中得到FOX-7晶体,用扫描电子显微镜（SEM）测试晶体的形貌、变温X-射线粉末衍射（XRD）分析晶型和相变、差示扫描量热仪（DSC）测试其热性能。结果表明,不同溶剂重结晶得到的FOX-7晶体形貌有较大差别,在DMSO/H2O溶剂中得到的晶体质量要优于其他两种;3种溶剂中得到FOX-7晶体的晶型和相变过程相同,即常温下FOX-7的晶型为α晶型,在120℃时,FOX-7完成α→β相变,至185℃时,完成β→γ相变;重结晶的FOX-7晶体5s爆发点温度提高了4~9℃,说明热稳定性增强。FOX-7 crystals were obtained by recrystallization from different solvents, such as iV, iV-dimethyl formamide（DMF）/H2O , dimethyl sulfoxide（DMSO）/H2O and N-methyl-2-pyrrolidone（NMP）/H2O , the morphologyof crystals was characterized by scanning electron microscope（SEM） , the crystal form and phase transition were analyzedby in-situ variable temperature X-ray diffraction（in-situ XRD） , and the thermal properties were tested by differentialscanning calorimetry（DSC）. The results show that the crystal morphology of FOX-7 obtained by recrystallizationfrom different solvents has bigger difference, and the quality of crystal obtained from DMSO/H2O is betterthan the other two kinds of solvents. The crystal form and phase transition process of FOX-7 crystal obtained fromthree kinds of solvents are the same, namely, the crystal form of FOX-7 is crphase at room temperature,α-β phasetransition occurs at 120°C and β→γ phase transition occurs at 185℃. The 5s explosion temperature of FOX-7 crystalsincreases by 4 - 9℃ , showing that the thermal stability is enhanced.

关 键 词：物理化学 FOX-7 晶体形貌 晶型 相变 DMF DMSO NMP 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O792[理学—晶体学]