AP/HTPB底排推进剂降压熄火试样的热分解研究

为了掌握AP/HTPB底排推进剂降压熄火后的热分解特性,采用半密闭爆发器制备AP/HTPB底排推进剂降压熄火的试样,利用DSC方法进行微量样品在3种升温速率下的热分解试验,并与AP/HTPB原样测试结果进行对比分析.结果表明,在相同升温速率下,降压熄火后的AP/HTPB底排推进剂的DSC曲线中,放热峰的形状发生了变化,...

Thermal Decomposition of Extinguished AP/HTPB Base Bleed Propellant under Condition of Transient Depressurization

In order to analyze the characteristics of extinguished AP/HTPB base bleed propellant under condition of transient depressurization, the extinguished AP/HTPB base bleed propellant samples were prepared by semi-closed bomb. Thermal decomposition experiments of the micro samples were carried out by using DSC at three heating rates, the experimental results were comparatively analyzed with the original samples. The results show that at the same heating rate, the shape of exothermic peak in the DSC curve of the extinguished AP/HTPB base bleed propellant under condition of transient depressurization changed from the "M-type" to "inverted V-shaped", and the peak temperatures is lower than the exothermic peak temperature of the original sample. The activation energy of endothermic peak is 7.2%~62.5% higher than that of the original sample, but the activation energy of the exothermic peak is 14%~21% lower than that of the original sample.