FOX-7颗粒形貌对其热性能及放气量的影响  

Effect of FOX-7 Particle Morphology on Its Thermal Properties and Outgassing Volume

作　　者：谢虓[1] 艾进[1] 于谦[1] 黄辉[2] XIE Xiao;AI Jin;YU Qian;HUANG Hui(Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang Sichuan 621999,China;China Academy of Engineering Physics,Mianyang Sichuan 621900,China)

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999 [2]中国工程物理研究院,四川绵阳621900

出　　处：《火炸药学报》2024年第7期606-613,I0002,共9页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.11702269)。

摘　　要：为获得FOX-7颗粒形貌对其热性能及放气量的影响规律,首先通过原位拉曼光谱证实了FOX-7的典型相变过程;采用差示扫描量热法(DSC)对比了原料FOX-7、重结晶FOX-7以及碾碎的重结晶FOX-7三种颗粒的转晶及热分解行为,并采用真空安定性测试比较了3种具有典型粒径及形貌差异的FOX-7的放气速率及放气量。结果表明,两种具有更多缺陷的FOX-7颗粒第一步热分解峰温度均低于重结晶样品;当FOX-7粒径较小,会导致其在DSC曲线上β到γ相变吸热峰消失;通过增加单次测试样品量或增加升温速率,增强相变热效应聚集,仍可观察到该相变过程;当加热时间相同,小粒径的FOX-7放气总量大于大粒径的颗粒;当大粒径颗粒表面具有缺陷,其放气量会更快达到最大值;当小粒径颗粒表明无明显缺陷,其加热初期放气量较小,但随着加热时间延长,其总放气量会显著增加并最终超过大粒径颗粒;FOX-7颗粒粒径决定了总放气量,而其颗粒缺陷决定了放气速率;苯胺类安定剂对FOX-7具有较好的放气抑制效果。To obtain the influence of FOX-7 particle morphology on its thermal properties and outgassing volume,the typical phase transformation process of FOX-7 was confirmed by in-situ Raman spectroscopy.Differential scanning calorimetry(DSC)was used to compare the crystal transformation and thermal decomposition behaviors of raw FOX-7,recrystallized FOX-7 and crushed recrystallized FOX-7 particles.Vacuum stability tests were used to compare the outgassing rates and outgassing volumes of three FOX-7 with typical particle size and morphology differences.The results show that the first step thermal decomposition peak temperature of FOX-7 particles with more defects is lower than that of recrystallized samples.If the particle size of FOX-7 is small,the endothermic peak ofβtoγphase transition disappears on DSC curve.The phase transition process can still be observed while increasing the weight of a single test sample or increasing the heating rate to enhance the thermal effect aggregation in the phase transition process.When the heating time is the same,the total outgassing of FOX-7 with small particle size is larger than that of FOX-7 with large particle size.When there are defects on the surface of large-size particles,the outgassing volume will reach the maximum faster.For the small particles with no obvious defects,its initial outgassing volume is small.However,its total outgassing volume will increase significantly and eventually exceed that of large particle size particles with the extension of heating time.The size of FOX-7 particles determines the total outgassing volume,while the morphology of FOX-7 particles determines the outgassing rate.Aniline stabilizers have good outgassing inhibition effect on FOX-7.

关 键 词：物理化学 1 1-二氨基-2 2-二硝基乙烯 FOX-7 颗粒形貌 热分解 晶型转变 真空安定性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O642[理学—物理化学]