3,6-二肼基-1,2,4,5-四嗪的热行为、比热容及绝热至爆时间(英文)

Thermal Behavior, Specific Heat Capacity and Adiabatic Time-to-Explosion of 3,6-Dihydrazino-1,2,4,5-tetrazine

利用差示扫描量热法(DSC)、热重-微商热重法(TG-DTG)研究了3,6-二肼基-1,2,4,5-四嗪(DHT)的热行为,其分解过程可分为两个放热的分解过程,且热分解反应的表观活化能分别为154.8和123.4kJ·mol-1,指前因子分别为1016.63和109.48s-1.DHT热爆炸的临近温度为426.10K.同时,利用微量热法和理论计算方法研究了DHT的比热容,298.15K时的标准摩尔比热容为183.61J·mol-1·K-1.计算获得了DHT的绝热至爆时间为263.84-297.58s之间的某一值.

Thermal behavior of 3,6-dihydrazino-l,2,4,5-tetrazine （DHT） was studied by differential scanning calorimetry （DSC） and thermogravimetry-derivative thermogravimetry （TG-DTG）, and the decomposition process can be divided into two exothermic decomposition stages. Values of the apparent activation energy （E） and pre-exponential constant （A） of the two exothermic decomposition stages are 154.8 and 123.4 kJ·mol^-1, 10^16.63 and 10^9.48 s^-1, respectively. The critical temperature of thermal explosion is 426.10 K. The specific heat capacity of DHT was determined by the micro- DSC method and theoretical calculation method. The standard molar specific heat capacity was found to be 183.61 J·mol^-1·K^-1 at 298.15 K. The adiabatic time-to-explosion of DHT was calculated to be a certain value between 263.84 s and 297.58 s.