热老化对TATB基高聚物粘结炸药力学性能的影响

Effects of Thermal Ageing on Mechanical Properties of PBX Based on TATB

对某TATB基高聚粘结炸药(PBX)进行了55～75℃加速老化试验,并对老化前后的样品进行了不同温度下压缩性能、拉伸性能和弯曲蠕变实验,用扫描电子显微镜对老化前后炸药高温拉伸断口形貌进行了观察。结果表明:长期高温贮存后,TATB基高聚物粘结炸药晶体与粘合剂仍具有良好的粘合界面,其模量、破坏强度、破坏应变和稳态蠕变速率等力学性能指标均未发生明显的变化。

The accelerated thermal aging tests of PBX based on TATB were carried out by using a hot air oven from 55 ℃ to 75 ℃.The mechanical properties such as tensile strength,elongation at failure and modulus were measured before and after aging.Morphology of rapture section from tensile test at 55 ℃ was observed by using scanning electric microscopy（SEM）.Results show that the mechanical properties and the interfacial mechanism between binder and TATB crystal do not undergo changes significant during the aging period.