凝胶态固液燃料的凝胶热稳定性研究  

Study on Gelation Thermal Stability of Gel-Solid-Liquid Fuel

作　　者：贾林[1] 张林军[1] 于思龙 杜姣姣[1] JIA Lin;ZHANG Linjun;YU Silong;DU Jiaojiao(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《兵器装备工程学报》2020年第10期125-129,共5页Journal of Ordnance Equipment Engineering

基　　金：科工局环试技术基础项目(JSHS2015208C001)。

摘　　要：采用低场核磁共振技术检测了35~80℃时,燃料、不含固相的半成品的横向弛豫时间T 2。利用扫描电镜观察了其微观结构。结果表明,Al粉的加入限制了高分子的运动空间、降低了溶剂烃的迁移速率,使得燃料的T 2值及分散度远小于半成品;随着检测温度的升高,半成品的T 2初始值增加,而燃料的T 2初始值基本不变;随着加热时间的延长,半成品的T 2值先增加后逐渐减少至定值,而燃料的T 2值没有增加;计算加热3 h后T 2值减少速率α,α发生突跃的温度是凝胶液化最低温度(T gel)。燃料、半成品的T gel分别是80℃和70℃。To study the gelation thermal stability of gel-solid-liquid fuel(hereafter referred to as fuel)and determine the high temperature extreme value temporarily stored in the field during combat readiness duty,low-field NMR was used to detect 35~80℃.The transverse relaxation time T 2 of fuel and non-solid semi-finished products(hereafter referred to as materiel)were detected,and its microstructure was observed by scanning electron microscope.The results show that the addition of Al powder limits the movement space of polymer,reduces the migration rate of solvent,and makes the T 2 value and dispersion of fuel much smaller than that of material.With the increase of detection temperature,the initial T 2 value of material increases,while the initial T 2 value of fuel basically remains unchanged.With the prolongation of heating time,the T 2 value of material increases first and then decreases gradually to a fixed value,while the T 2 of fuel does not increase.The reduction rateαof T 2 was calculated after 3 hours of heating.The temperature ofαjumped was the minimum temperature of gel liquefaction T gel.Fuel and material T gel are 80 and 70℃,respectively.

关 键 词：低场核磁共振 凝胶态固液燃料 凝胶热稳定性 凝胶液化 高分子运动 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术]