4,4'-联-1,2,4-三唑的晶型转变及热分解行为  

Phase Transition and Thermal Decomposition Behaviors of 4,4′-Bis-1,2,4-triazole

作　　者：池钰[1] 刘渝[1] 张晓玉[1] 张勇[1] 黄明[1] 李鸿波[2] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900 [2]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《含能材料》2012年第6期697-700,共4页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金(10979037)

摘　　要：利用原位粉末X射线衍射(XRD)和差式扫描量热分析(DSC)、热重分析(TG)研究了4,4'-联-1,2,4-三唑(BTz)的晶型转变、热行为和非等温分解反应动力学。结果表明:BTz的热稳定性较好,170℃附近发生晶型转变,274.6℃熔融后发生热分解,分解峰值温度Tp=290.0℃;原位XRD分析和DSC分析显示BTz的晶型转变可逆;借助不同升温速率的分解峰值温度,计算获得的Tp0=256.3℃,采用Kissinger法和Ozawa法求得BTz的分解反应表观活化能Ea分别是224.7,222.4 kJ.mol-1,指前因子A分别是6.31E+20 s-1和3.98E+20 s-1。Characteristics of phase transition, thermal behavior and kinetics of non-isothermal decomposition of 4＇4-bis-1,2,4-triazole （BTz） were studied using in-situ X-ray diffraction （XRD）, differential scanning calorimetry （DSC） and thermogravimetry （TG）. The results show that, at around 170℃, the solid-solid phase transition is detected at a heating rate of 10 ℃ · mol -1 ,followed by the melting starting at about 270 ℃ and the peak temperature of thermal decomposition of BTz is 290.0℃. The phase transition of BTz is reversible according to the result of in-situ XRD and DSC. Based on the detected decomposition temperatures at various heating rates （/3）, the decomposition temperature at the heating rate approach to zero was derived with the value Tp0 = 256.3 ℃. By means of Kissinger method and Ozawa method, the calculated activation energies （Ea） are 224.7 kJ · mol -1 and 222.4 kJ · mol -1, and pre-exponential factors （A） are 6.31E＋20 s-1 and 3.98E＋20 s-1, respectively.

关 键 词：物理化学 晶型转变 4 4'-联-1 2 4-三唑 原位XRD 热分解动力学 

分 类 号：TQ560.1[化学工程—炸药化工]