多硝基化合物的结晶过程与晶体特征研究
毕业论文关键词 奥克托今，黑索金，重结晶，晶体形态，晶型，热安定性
Title Study on Crystallization process and Characterization of Explosives by Recrystallization
Abstract HMX and RDX are high-energy explosives which are used in military widely．It has high density, high energy, low sensitivity and excellent comprehensive performance. The crystal perfection of elemental explosives have a significant impact on the sensitivity and thermal stability. The crystal characteristics can be improved by recrystallization process from the solutions. It is important to research the recrystallization process of the explosive for improving performance of explosives. The different crystal morphologys of explosives were obtained from re-crystallizing with difference solvents such as dimethyl sulfoxide(DMSO), acetoniwile(ACN), acctone(AC)，butyrolacetone(BL)， and different temperature，cyclohexacctone(CH) and dimethylformamile(DMF)．The EM pictures shows that :(1) the solubility of solvent affects the explosives solution and the solvents have great influence On the morphology of HMX Crystals. ：the grown crystals from the CH and BL have a small needle shape. ．From DMSO，ACN and AC solution HMX crystals were grown in a regular shape with smooth surface．(2) Temperature on the crystal growth has a significant impact, grow at higher temperatures than the general quality of the HMX crystals grow better at lower temperatures. The polymorphs and thermal stability of the re-crystallization were analyzed. The XRD analysis reveals that the crystals are β-HMX.The TG analysis reveals that the morphology of RDX has great effects on its thermal stability.
Keywords: HMX RDX Recrystallization crystal morphology polymorph Thermal stability
目录
1、引言 1
1.1 本课题研究的目的 . 1
1.2 奥克托今和黑索金简介 .. 1
1.2.1 溶剂-非溶剂法 .. 2
1.2.2 降温法 2
1.3 本论文的主要研究工作 .. 3
2、炸药重结晶原理及晶体生长理论 4
2.1 结晶原理 .. 4
2.2 晶体生长理论 5
2.2.1 晶核的形成 .. 6
2.2.2 晶核生长的扩散 6
2.2.3 晶体的生长 .. 7