KDNBF形貌控制及其对热分解行为和感度的影响(英文)

通过7-羟基-4,6-二硝基-5,7-二氢苯并呋咱(DNBF)的钠盐与硫酸钾在水溶液中反应,制备得到DNBF的钾盐(KDNBF).在制备过程中加入不同表面活性剂,得到了不同晶形的KDNBF样品.运用X射线粉末衍射分析了单种晶形控制剂对样品晶形的影响.采用差示扫描量热(DSC)和热重(TG)分析技术研究了不同晶形样品的热分解特性,利用Kissinger方法和Ozawa-Doyle方法研究了样品第一放热分解峰的分解动力学过程.结果表明球形样品与其它晶形的样品相比,具有较低的分解温度、较高的活化能;同时发现,球形样品具有较高的摩擦和撞击感度与较低的火焰感度.

Morphology Control and Its Influence on the Decomposition Behavior and Sensitivity of KDNBF

The potassium salt of 7-hydroxy-4,6-dinitro-5,7-dihydrobenzofuroxanide (KDNBF) was prepared by a reaction of the sodium salt of DNBF with potassium sulfate in aqueous solution.Samples of KDNBF with different morphologies were obtained by adding various suffactants.The effect of a single surfactant on the sample morphology was determined with powder X-ray diffraction (XRD) data.The thermal decomposition behaviors of KDN-BF with different shapes were studied using differential scanning calorimetry(DSC) and thermogravimetry(TG) analyses.The kinetic parameters of the exothermic processes were studied by applying the Kissinger's and Ozawa-Doyle' s methods.The results show that the spherical sample has a lower decomposition temperature and higher reaction activation energy than the other forms of the sample.Furthermore,impact sensitivity,flame sensitivity,and friction sensitivity tests indicated that the spherical KDNBF sample has stronger friction and impact sensitivities and weaker flame sensitivity.