不同TMETN/NG配比对CMDB推进剂塑化特性的影响  

Effect of Different TMETN/NG Ratios on the Plasticizing Characteristics of CMDB Propellant

作　　者：唐秋凡 屈蓓[1] 李吉祯[1] 张林 张亚俊[1] 张正中[1] 樊学忠[1] TANG Qiu-fan;QU Bei;LI Ji-zhen;ZHANG Lin;ZHANG Ya-jun;ZHANG Zheng-zhong;FAN Xue-zhong(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China;Army Representation Office of Air Force in Northwest,Xi’an 710043,China)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]空军驻西北地区军事代表室,陕西西安710043

出　　处：《火炸药学报》2018年第5期489-495,共7页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.21401124)

摘　　要：为了提高三羟甲基乙烷三硝酸酯(TMETN)对NC的增塑效果,通过分子动力学模拟不同TMETN/NG配比条件下推进剂体系的回旋半径、自由体积等参数,研究NG部分取代TMETN对CMDB推进剂塑化特性的影响,并通过固化实验以及机械感度测试对模拟结果进行验证。结果表明,在计算范围内,随着NG含量的增加,体系的回旋半径、自由体积均先减小后增加,体系的塑化能力也是先减小后增大,且当NG取代质量分数40%及以上的TMETN时能有效改善体系的增塑效果;推进剂中NG与TMETN质量比大于2∶3时,推进剂样品才能正常固化;NG与TMETN质量比控制在3∶2～4∶1时,既能保证CMDB推进剂固化均匀,又能降低推进剂的机械感度。To improve the plasticizing effect of trimethylolethane trinitrate(TMETN)on NC,the cyclotron radius and free volume etc.parameters for propellant system under the conditions of different ratios of TMETN/NG was simulated by molecular dynamics.The effect of partly replacing TMETN with NG on the plasticizing characterizations of CMDB propellant was studied and the simulation results were validated by curing experiment and sensitivity test.Results show that within the calculation range,the cyclotron radius and free volume of the system decrease first and then increase with the increase of NG content.The plasticizing capacity of the system first reduces and then increases and when replacing TMETN of mass fraction as 40%with NG,the plasticizing effect of the system can be effectively improved.The propellant samples can be cured only when the mass ratio of NG and TMETN in the propellant is greater than 2:3.When the mass ratio of NG and TMETN is controlled at 3:2-4:1,it can not only guarantee the uniform curing of CMDB propellant,but also reduce the mechanical sensitivity of the propellant.

关 键 词：分子动力学模拟 TMETN NC 塑化特性 浇铸CMDB推进剂 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]