低场核磁共振技术在火炸药老化性能评估中的应用  

Application of LF-NMR in Aging Property Evaluation of Explosives and Propellants

作　　者：杜姣姣[1] 贾林[1] 王芳芳[1] 于思龙 王琼[1] 常海[1] 张林军[1] DU Jiao-jiao;JIA Lin;WANG Fang-fang;YU Si-long;WANG-Qing;CHANG Hai;ZHANG Lin-jun(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西安近代化学研究所

出　　处：《含能材料》2019年第12期1017-1024,共8页Chinese Journal of Energetic Materials

基　　金：装备发展部预先研究项目资助(002040501)

摘　　要：低场核磁共振(Low-field nuclear magnetic resonance,LF-NMR)技术具有快速、无损、连续、精确等优点,近年来在火炸药基体的交联密度测定、固化过程监测及老化性能评估领域受到了关注。介绍了低场核磁共振的基本原理,归纳了低场核磁共振技术在复合固体推进剂固化监测、复合固体推进剂和浇注PBX炸药交联老化评定、新型云爆剂老化特性评估等方面的应用状况,提出了应进一步深入开展LF-NMR在火炸药老化性能监测方面的研究,解决不同种类1H弛豫特性的分类监测、弛豫特征参量与力学性能关键参量的相关性方程建立等重点问题,加强低场核磁共振中的弛豫特性关键参量——横向弛豫时间T2在火炸药老化性能评估中的应用。Low-field nuclear magnetic resonance(LF-NMR)technology has the advantages of fast,nondestructive,continuous and accurate,which has attracted attention in the fields of cross-linking density,curing process monitoring and aging property evaluation of explosives and propellants.The basic principle of LF-NMR was introduced.The application of LF-NMR in the cur-ing monitoring of composite solid propellants,cross-linking aging assessment of composite solid propellants and polymer bond-ed explosive(PBX),and aging property evaluation of new type fuel air explosives(new-type FAE)was summarized.It was pro-posed that the application of LF-NMR in the aging performance monitoring of explosives and propellants should be further stud-ied,the problems of classification monitoring of different 1H relaxation characteristics and establishment of correlation equations between relaxation characteristic parameters and key parameters of mechanical properties should be solved,and the application of key parameters——transverse relaxation time(T2)of LF-NMR in the aging performance evaluation of explosives and propel-lants should be strengthened.

关 键 词：火炸药 低场核磁共振(LF-NMR) 老化性能 交联密度 弛豫时间 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O65[理学—分析化学]