Thermochemistry of Evaporation and Sublimation of 2,4,6-Triazido-1,3,5-triazine

详细信息    查看全文

• 作者：Boris L. Korsunskiy ; Vadim V. Nedel'ko ; Viktor V. Zakharov ; Nikita V. Chukanov ; Alexandr D. Chervonnyi ; Tatiana S. Larikova and Sergey V. Chapyshev
• 刊名：Propellants, Explosives, Pyrotechnics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：42
• 期：2
• 页码：123-125
• 全文大小：263K
• ISSN：1521-4087

文摘

Saturated vapor pressure over cyanuric triazide melt was measured in the temperature range 393.15–453.15 K using glass membrane Bourdon pressure gauges. Measured evaporation heat and evaporation entropy are equal to 61.1±3.3 kJ mol^–1 and 111.3±6.1 J mol^–1 K^–1, respectively. According to DSC data, melting heat and melting entropy of cyanuric triazide are 22.2±1.3 kJ mol^–1 and 60.5±3.5 J mol^–1 K^–1, respectively. Based on the results obtained, the following dependence was found for the saturated vapor pressure over solid cyanuric triazide: P_s [Pa]=10^14.0⋅exp[(–83300±3300)/RT]. Concequently, sublimation heat and sublimation entropy of cyanuric triazide are equal to 83.3±3.3 kJ mol^–1 and 171.8±9.6 J mol^–1 K^–1, respectively. Saturated vapor pressure over solid cyanuric triazide at room temperature is equal to 0.25 Pa (1.9×10⁻³ Torr). It is concluded that high volatility of cyanuric triazide is caused by its low sublimation heat.