钨含量对氟聚物基含能材料放热反应与燃烧性能的影响  

Effect of Tungsten Content on the Exothermic Reaction and Combustion Performance of Fluoropolymer-based Energetic Materials

作　　者：王明智 刘金旭[1] 贺川 庄治华 方澳翔 李树奎[1] WANG Ming-zhi;LIU Jin-xu;HE Chuan;ZHUANG Zhi-hua;FANG Ao-xiang;LI Shu-kui(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;School of Materials Engineering,Jiangsu University of Technology,Changzhou Jiangsu 213001,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]江苏理工学院材料工程学院,江苏常州213001

出　　处：《火炸药学报》2024年第5期461-467,I0005,共8页Chinese Journal of Explosives & Propellants

基　　金：江苏省高等学校基础科学研究面上项目(22KJD430006);常州市领军型创新人才引进培育项目(CQ20210118)。

摘　　要：为了探索钨对氟聚物基含能材料放热反应与燃烧性能的影响,采用双重球磨混料工艺制备了不同钨含量的氟聚物基含能材料,借助SEM和XRD表征了含能材料燃烧反应前后的微观结构;用氧弹量热仪和同步热分析仪(TG-DSC)分析了含能材料放热反应的释能密度和反应机理,并利用高速热成像相机对含能材料的燃烧特性进行评价。结果表明,随着钨质量分数由0增至30%,氟聚物基含能材料的放热反应释能密度由3690 J/g降至2695 J/g,燃烧速率从40.5 mm/s降至19.6 mm/s;不加钨时,含能材料燃烧火焰的温度最低;随着钨含量增加,火焰温度先显著升高然后缓慢降低;这是由于钨的加入减缓了Al与PTFE放热反应的热量传递,推迟了Al与Fe_(2)O_(3)的放热反应进程。加入钨后生成W_(2)C的反应造成了更多放热反应累积叠加,使氟聚物基含能材料产生更剧烈的燃烧反应过程和更高的火焰温度。In order to explore the effect of tungsten on the exothermic reactions and combustion performance of fluoropolymer-based energetic materials,the fluoropolymer-based energetic materials with different contents of tungsten were prepared by using dual ball milling process.The microstructures of the prepared energetic materials before and after combustion reaction were characterized via SEM and XRD.The energy release density and reaction mechanism of exothermic reaction of energetic materials were analyzed by using oxygen bomb calorimeter and thermal analyzer(TG-DSC).The high-speed thermographic camera was used to evaluate the combustion characteristics of energetic materials.The results show that the energy release density of exothermic reactions of fluoropolymer-based energetic materials decreases from 3690 J/g to 2695 J/g,and the burning rate decreases from 40.5 mm/s to 19.6 mm/s as the tungsten content increases from 0 to 30%.The combustion flame temperature of the energetic material without tungsten is the lowest.As the tungsten content increases,the combustion flame temperature increases significantly then decreases slowly.This maybe due to the addition of tungsten diminishes the heat transfer of the exothermic reaction between Al and PTFE,which delays the exothermic reaction process between Al and Fe_(2)O_(3).The produced W_(2)C after adding tungsten cause more accumulative stacking of exothermic reactions,resulting in more intense combustion reaction and higher combustion flame temperature of fluoropolymer-based energetic materials.

关 键 词：物理化学 钨 氟聚物 含能材料 Al粉 PTFE 放热反应 燃烧性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O643[理学—物理化学]