ANTA/TNA二元低共熔物的热分解及其熔融结晶动力学  

Thermal Decomposition,Melting Kinetics and Crystallization Kinetics of the Lowest Eutectic Mixture of ANTA/TNA

作　　者：钟圣 金波 彭汝芳 ZHONG Sheng;JIN Bo;PENG Ru-fang(Southwest University of Science and Technology,State Key Laboratory of Environmentally Friendly Energy Materials,Mianyang 621010,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,四川绵阳621010

出　　处：《含能材料》2023年第10期970-978,共9页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(21875192)。

摘　　要：为了获得3-氨基-2,4,6-三硝基苯甲醚(ANTA)/N-甲基-2,4,6-三硝基苯甲胺(TNA)低共熔物的热分解性能及其熔融结晶动力学参数,采用差示扫描量热法(DSC)研究了ANTA/TNA低共熔物的热分解性能,计算了热分解动力学参数;采用微热量热法研究了添加剂奥克托今(HMX)和黑索今(RDX)对ANTA/TNA低共熔物熔融结晶过程的影响,并分别利用Satava-Sestak法和Avrami法分析了低共熔物非等温熔融和结晶行为。结果表明:低共熔物的热稳定性较好,热分解动力学参数与ANTA和TNA接近;低共熔物熔融过程符合一级反应动力学,升温速率对熔融动力学参数影响较大,添加剂能够一定程度减弱熔融动力学参数对升温速率的依赖程度;低共熔物的结晶过程随降温速率的增大而逐渐向低温区转移,其结晶速率随结晶度的增大而减小,在HMX介质中,结晶速率受结晶度的影响较小,在RDX中的结晶速率随结晶度的增大而增大。In order to obtain the thermal decomposition properties and melting crystallization kinetic parameters of the lowest eutectic mixture of 3-amino-2,4,6-trinitroanisole(ANTA)/N-methyl-2,4,6-trinitroanisole(TNA),the thermal decomposition properties of the lowest eutectic mixture of ANTA/TNA were studied by differential scanning calorimetry(DSC),and the thermal decomposition kinetic parameters were calculated.The effects of additives(HMX and RDX)on the melting process and crystallization process of the lowest eutectic mixture of ANTA/TNA were studied by microcalorimetry.The non-isothermal melting and crystallization behaviors of the eutectic mixture were analyzed by Satava-Sestak method and Avrami method,respectively.Results show that the lowest eutectic mixture has good thermal stability,and the thermal decomposition kinetic parameters are close to that of ANTA and TNA.The melting process of eutectics conforms to the first-order reaction kinetics,and the heating rate has a great influence on the melting kinetic parameters.Additives can reduce the dependence of melting kinetic parameters on the heating rate to a certain extent.The crystallization process of the lowest eutectic mixture gradually shifts to the low temperature region with the increase of cooling rate,and the crystallization rate decreases with the increase of crystallinity.In HMX medium,the crystallization rate is less affected by crystallinity,and the crystallization rate in RDX increases with the increase of crystallinity.

关 键 词：ANTA/TNA 低共熔物 热分解 熔融动力学 结晶动力学 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O62[理学—有机化学]