火炸药学报2025，Vol.48Issue(12)：1110-1120,11.DOI:10.14077/j.issn.1007-7812.202504003
EVA对DNTF基复合材料性能提升的影响
Effect of EVA on the Properties of DNTF-Based Composites
摘要
Abstract
To enhance the safety performance of 3,4-dinitrofurazanfuroxan(DNTF),1,1′-diamino-2,2′-dinitroethylene(FOX-7)was combined with it at a specific mass ratio and ethylene-vinyl acetate(EVA)to prepare DNTF-based composite materials.It was reveal that the mechanical properties of the DNTF/FOX-7 composite were the best at a mass ratio of 60∶40 according to molecular dynamics simulations.The detonation velocity,explosion heat and explosion pressure of DNTF and FOX-7(60∶40)were further calculated using Explo5.0,which were 8 753 m/s,-5 569 kJ/kg and 33.76 GPa,respective-ly,comparable to the detonation velocity of RDX.The two components were mixed at a mass ratio of 60∶40,and then was coated by EVA at mass fractions of 2％,4％,6％,8％,and 1 0％,respectively,to prepare DNTF-based composite materi-als.The morphology,structure,thermal decomposition properties,safety performance,and combustion behavior of the com-posites were investigated using scanning electron microscopy(SEM),X-ray powder diffraction(XRD),Fourier-transform infra-red spectroscopy(FT-IR),differential scanning calorimetry(DSC),BAM sensitivity testing,and ignition combustion experi-ments.The results indicates that the DNTF-based composite materials prepared exhibits optimal coating effectiveness when the mass fraction of EVA added is 6％to 8％.At the mass fraction of 6％EVA addition,the apparent activation energy for the thermal decomposition of DNTF/FOX-7 increases by 20.01 kJ/mol,while the characteristic drop height and friction energy are improved by over 20cm(BAM,5kg)and 36N,respectively,which means the safety performance of the explosive is en-hanced.Additionally,the ignition delay time of DNTF/FOX-7 is reduced to 36 seconds.关键词
物理化学/FOX-7/3,4-二硝基呋咱基氧化呋咱/DNTF/乙烯-醋酸乙烯酯/EVA/机械感度/热分解性能Key words
physical chemistry/FOX-7/3,4-dinitrofurazanoxyfuraxan/DNTF/ethylene-vinyl acetate/EVA/mechanical sensi-tivity/thermal decomposition properties分类
军事科技引用本文复制引用
金芷妃,辛启超,王宇利,李媛媛,肖继军,马海霞..EVA对DNTF基复合材料性能提升的影响[J].火炸药学报,2025,48(12):1110-1120,11.基金项目
陕西省创新团队建设项目(No.2022T-33) （No.2022T-33）
国家级大学生创新训练计划项目(No.202410697026) （No.202410697026）
陕西省大学生创新训练计划项目(No.S202510697338) （No.S202510697338）
