【摘要】 采用ＤＭＡ（动态机械热分析仪）研究了几种含能粘结剂的机械松弛，从动态力学性能的ＴＴＳ（时温叠加１）原理，求得时间位移与频率对数的关系曲线及ＷＬＦ方程的常数Ｃ１和Ｃ２，应用ＷＬＦ方程，把时间位移与频率对数曲线的拐点作为材料由高弹态变为玻璃态的判据，计算求得火箭发动机点火瞬间粘结剂系统的临界温度Ｔｃ，根据自由体积理论模型和结晶理论解释了Ｔｃ的物理意义。并研究了临界温度与玻璃化转变温度之间的关系更多还原

【Abstract】 In this paper, the mechanical relaxation of some energetic binder was investigated by DMA. Base on the time temperature superposition principle of dynamic mechanical performance, the relationship curves of time shift vs logarithm frequency and constants C 1 and C 2 of WLF equation were obtained. The onset of the rubber to glass transition in the curve of time shift vs logarithm frequency was selected as failure criterion, and the critical temperature T c below which the binder will begin to rapidly lose its elastomeric properties under motor operating conditions was calculated with WLF equation. According to the free volume model and the crystallization theory, the physics significance of T c was interpreted. The relationship between the critical temperature and the glass transition temperature was investigated.更多还原