HNS的热行为研究

Thermal Behavior of HNS

用热失重-微商热重(TG-DTG)、热失重质谱联用(TG-MS)和原位热裂解与快速扫描傅立叶变换红外(RSC-FTIR)技术研究了2,2,′4,4,′6,6′-六硝基均二苯基乙烯(HNS)的热分解全过程,获得HNS的热分解反应动力学参数,提出了可能的分解机理。结果表明:HNS的热分解为两步:第一步通过α-CH对位的硝基(—NO2)异构化为亚硝基(—ONO)和“五元环化合物”中间体的分解,生成多聚碳氢化合物的“炸药焦”。第二步为“炸药焦”分解释放出CO2等气体。

The whole process of thermal decomposition of （2,2＇,4,4＇,6,6＇） hexanitro-stilbene （HNS） is investigated by using TG-DTG,TG-MS and in-situ thermolysis rapid scan FTIR coupling techniques. Kinetic parameters of the thermal decomposition of HNS are obtained and a possible decomposition mechanism is suggested. Results show that the thermal decomposition process can be divided into two stages： （1） forming “explosive coke” via the nitro-nitrite isomerization on the C-NO2 p-substituted to α-CH bond and the decomposition of “five cycled compound” intermediate between α-CH and o-nitrio in the first stage, （2） releasing CO2 and othergases via “ explosive coke” decomposing in the second stage.