功能助剂对DNAN/RDX熔铸炸药界面黏结强度的影响  

Effect of Functional Additives on Interface Bonding Strength of DNAN/RDX Melt-cast Explosives

作　　者：蒙君煚 周霖[2] 金大勇[1] 牛磊[1] 王亲会[1] MENG Jun-jiong;ZHOU Lin;JIN Da-yong;NIU Lei;WANG Qin-hui(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《含能材料》2018年第9期765-771,815,共8页Chinese Journal of Energetic Materials

摘　　要：为了提高2,4?二硝基苯甲醚(DNAN)/黑索今(RDX)熔铸炸药的力学性能,用分子动力学的方法模拟了功能助剂N?甲基?4?硝基苯胺(MNA)、吐温60(Tween60)、三?(β氯乙基)磷酸酯(CEF)、乙酸丁酸纤维素(CAB)对界面结合能的影响规律;采用粉体接触角法和白金板法测定接触角及表面张力,通过计算黏附功对模拟结果进行了验证;采用巴西实验及扫描电镜(SEM)分别从宏观及微观尺度对黏附功实验进行验证。结果表明,功能助剂对DNAN/RDX界面结合能改变能力大小由高到低排序为CAB>CEF>Tween60>MNA,试验结果与数值模拟结果吻合;功能助剂CAB、CEF、Tween 60、MNA可使DNAN/RDX炸药的抗拉强度分别提高58.37%,47.85%,29.71%,5.83%;随着黏附功的增加,药柱断裂模式由穿晶/沿晶混合断裂向纯粹穿晶断裂转变。To improve the mechanical property of 2,4-dinitroanisole(DNAN)/RDX melt-cast explosives,the effect of functional additives,N-methyl-4-nitroaniline(MNA),Tween 60,tris-(β-chloroethyl)fosfat(CEF)and cellulose acetate butyrate(CAB)on the interfacial binding energy was simulated by molecular dynamics.The powder contact angle method and platinum plate method were used to measure the contact angle and surface tension,and the simulation results were verified by calculating the adhesion work.The experiments of adhesion work were verified from macroscopic and microscopic scales by Brazilian experiments and scanning electron microscopy(SEM),respectively.Results show that the order of change ability of functional additives on DNAN/RDX interfacial binding energy from high to low is CAB>CEF>Tween 60>MNA,and the experimental results agree well with the numerical simulation ones.Functional additives,CAB,CEF,Tween 60 and MNA can make the tensile strength of DNAN/RDX explosive increase by 58.37%,47.85%,29.71%and 5.83%,respectively.With the increase of adhesion work,the fracture mode of grain is changed from transgranular/intergranular mixed fracture to pure transgranular fracture.

关 键 词：2 4-二硝基苯甲醚(DNAN) 功能助剂 黏附功 抗拉强度 断裂模式 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]