【摘要】 用线膨胀仪测试了TATB基PBX的线膨胀系数(CTE),分析了配方、工艺等因素对PBX的CTE的影响情况。结果表明,氟聚合物粘结的TATB基PBX在室温～70℃间的CTE值很大,粘结剂氟聚合物在物理特性上的差别对TATB基PBX的CTE影响很小,而替用玻璃化转变温度高于75℃的高聚物可使PBX在室温～70℃间的CTE值显著下降。与钢模压制方法相比,采用等静液压方法可以使TATB基PBX药柱在室温～70℃的CTE值降低30%以上。冷热循环处理也可在一定程度上降低PBX的CTE值。更多还原

【Abstract】 The linear coefficient of thermal expansion of the TATBbased PBXs are measured by thermal expansion apparatus, and the effect of composition and technology on CTE are also studied. The results show that the CTE values of fluoropolymer bonded TATB between ambient temperature and 70℃ are very great, and the distinction in physical properties of fluoropolymer have no clear effect on CTE. By using a binder with high glass transition temperature (Tg) instead of F2314 , the CTE of pellets between ambient temperature and 70℃ are remarkably decreased. The CTE values of samples pressed isostatically are smaller 30% than samples pressed mechanically between ambient temperature and 70℃. The CTE of TATBbased PBX can be lowered 20% by means of repeated thermal cycle.更多还原