TATB基高聚物粘结炸药及其粘结剂的玻璃化温度与DMA测量频率关系的研究

Study of Relationships between Glass Transition Temperatures and Test Frequencies on TATB-based PBXs and Their Binders Using DMA

用动态力学分析 (DMA)方法 ,研究了四种TATB基PBX及其粘结剂 (氟聚物 )的测量频率与玻璃化温度的关系。结果显示 :在这四种氟聚物F2 314 、F2 311、F2 4 63 和F2 60 3中 ,只有F2 314 存在明显的二次转变 ,这是由于F2 314 分子中具有较多的C—Cl键所引起的。从测量频率与玻璃化温度之间的关系 ,得到PBX及其粘结剂的活化能数据。经比较发现 :TATB基PBX中 ,极高填充量的TATB颗粒的存在会对粘结剂链段的构象运动产生明显的限制作用。

Relationship between test frequency and glass transition temperature was studied for four TATB based PBXs and their binders (fluoropolymers),by using dynamic mechanical analysis (DMA) method. Results showed that of the four fluoropolymers,F 2314 ,F 2311 ,F 2463 and F 2603 ,only F 2314 has an apparent secondary transition,which is ascribed to the fact that there are much more C—Cl bonds attached to a F 2314 molecule. Meantime,the activation energies of the PBXs and their binders were calculated from the relationship between test frequency and glass transitiontemperature for the PBXs and their binders. It followed from comparisons between the activation energies of the PBXs and their binders that present of high contented TATB particles in the PBX may cause an obvious limitation in conformational movement of polymeric segment. A simple model,which had been confirmed by SEM photos of some PBXs, was presented to explain this phenomenon.