DNTF在不同形貌HMX中的非等温结晶行为研究

Non-isothermal Crystallization Behavior of DNTF in Different Morphology HMX

采用差示扫描量热技术研究了3,4-二硝基呋咱基氧化呋咱（DNTF）在粒径为1~5μm两种不同形貌的HMX中的非等温结晶行为,运用多种数学模型对DNTF的结晶动力学进行数据处理。结果表明：该尺寸下HMX在加入量为50wt%时能够大幅降低过冷度,有效消除自加热。两种不同体系的结晶机理函数基本相同,相同结晶度下球形HMX组成的DNTF/HMX体系中DNTF的结晶速度更快,且其活化能更低。

The non-isothermal crystallization of 3,4-dinitrofurazanofuroxan（DNTF）in different morphology HMX with the size of 1~5μm was studied by DSC. Several kinetics models were used to investigate the crystallization behavior of DNTF. The results show that adding 50wt% HMX can reduce the super-cooling degree of DNTF and eliminate self-heating of DNTF crystallization. The behaviors of non-isothermal crystallization of DNTF in two different morphology HMX system were compared. It was found that the mechanism function g（a） was the same, the crystallization rate of DNTF in DNTF/HMX system composed by spherical HMX was faster, and the active energy was lower than that in DNTF/HMX system composed by polyhedron HMX.