摘要
通过DSC TG热分析方法,对单组分聚氨酯和硼改性酚醛树脂两种多碳有机物对叠氮化钠气体发生剂的热分解动力学特性进行了研究。单组分聚氨酯降低了叠氮化钠热分解温度37℃,对叠氮化钠热分解温度影响较小;硼改性酚醛树脂降低了叠氮化钠热分解温度56℃,促进了叠氮化钠热分解。利用ASTM E698法和Ozawa法计算多组分混合物体系活化能,结果发现,单组分聚氨酯混合物体系表观活化能分别为385、397 kJ/mol;硼改性酚醛树脂混合物体系表观活化能分别为275、286 kJ/mol,两种方法计算结果较一致。与纯叠氮化钠热分解活化能值163 kJ/mol相比,硼改性酚醛树脂和单组分聚氨酯都提高了叠氮化钠热分解表观活化能,使叠氮化钠性能更稳定,达到热分解所需能量更高。
The sodium azide as a gas generating agent can be used in equipment such as missiles and satellites,providing an auxiliary power and gas source.The DSC TG thermal analysis method has been used to analyze the thermal decomposition kinetics of sodium azide.One component polyurethane reduces the thermal decomposition temperature(Td)of sodium azide by 37℃,so it has limited effect on the Td of sodium azide;Boron modified phenolic resin reduces the thermal decomposition temperature of sodium az ide by 56℃,promoting the thermal decomposition of sodium azide.The activation energy of the multi component system was calcu lated by using the ASTM E698and the Ozawa methods.It is shown that the activation energy(Ea)of the one component polyure thane system was 385 kJ/mol and 397 kJ/mol,whereas the Ea of boron modified phenolic resin mixture system was 275 kJ/mol and 286 kJ/mol,respectively.These calculated results by two different methods are very consistent with each other.Compared to Ea of pure sodium azide decomposition(163 kJ/mol),boron modified phenolic resin and one component polyurethane both improved the Ea of sodium azide decomposition and hence they may make it more stable.
作者
舒君玲
庞爱民
王小强
张一帆
杨威
SHU Junling;PANG Aimin;WANG Xiaoqiang;ZHANG Yifan;YANG Wei(Hubei Institute of Aerospace Chemical Technology,Xiangyang 441003,China;The Key Laboratory of Emergency Safety and Rescue Technology of Hubei,Xiangyang 441003,China;Science and Technology on aerospace Chemical Power Laboratory.Xiangyang 441003,China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2020年第1期45-52,共8页
Journal of Solid Rocket Technology
关键词
气体发生剂
叠氮化钠
单组分聚氨酯
硼改性酚醛树脂
有机碳多孔骨架
gas generating agent
sodium azide
one component polyurethane
boron modified phenolic resin
organic carbon porous skeleton
