摘要
采用单向拉伸、动态力学分析(DMA)、热重法-差示扫描量热法(TG-DSC)联用及热流微量量热计(HFMC)等表征方法,研究了PET型燃气发生剂的热老化特性。结果表明,随老化时间延长,该燃气发生剂最大抗拉强σm、高温段(>α转变温度)储能模量E′增大,延伸率εm、损耗因子tanδ降低。TG-DSC实验发现,该燃气发生剂老化初期存在增塑剂损失,高温老化样品表面发黑和HFMC实验表明,可能存在以放热效应为标志的后固化和热氧化(炭化)反应。因此,除增塑剂挥发造成的物理老化外,热老化初期发生的后固化和热氧化(炭化)反应是PET型燃气发生剂力学性能变化的主要原因。
Thermal aging properties of PET gas generating propellant were investigated through uniaxial tensile test,dynamic mechanical analysis,TG-DSC test and heat flow microcalorimetry（HFMC）.The results indicate that mechanical parameters of this propellant,such as tensile strength σm,storage modulus E′（above α transition temperature）increased and the elongation εm,loss factor tanδ decreased during the aging periods.It is found from TG-DSC curves that there is a significant mass loss of plasticizer of aging samples.The surface of aging samples become black and the exothermic effect that appeared in HFMC curve indicate that there may be a post curing reaction and oxidation（carbonous）reaction.Therefore,except for the loss of plasticizer which leads to physical aging,the post curing reaction and oxidation（carbonous）reaction are the main reasons to lead to the change of mechanical properties of PET gas generating propellant.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2010年第3期323-326,共4页
Journal of Solid Rocket Technology
关键词
PET型燃气发生剂
贮存性能
力学性能
老化
PET gas generating propellant
storage properties
mechanical properties
aging
作者简介
作者简介：杨根（1980-），男，硕士，从事固体推进剂贮存性能研究。E-mail：lingyun472@sohu．com
