Hu Yong-hua, Li Shu-fen
State Key Laboratory of Fire Science and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2007 Dec;27(12):2413-6.
The thermal decomposition processes of 2-H-heptafluoropropane were investigated during a 30 second reaction time and at temperatures of 400, 500, 600, 700 and 800 degrees C using fast pyrolysis method and Fourier transform infrared spectra (FTIR) and gas chromatography/mass spectrometry (GC/MS) analytical techniques. The results indicate that the reaction temperatures have the obvious effects on the thermal decomposition of 2-H-heptafluoropropane. The 2-H-heptafluoropropane is steady at first three temperatures, whereas starts to obviously decompose at 700 degrees C and undergoes intense decomposition at 800 degrees C. At the same time, coke formation was observed on the surface of the reactor at 800 degrees C. Moreover, three cyclocompounds, 1,2-bis(trifluoromethyl) perfluoroindane, perfluoro(1-ethylideneindane) and octafluoronaphthalene, were for the first time discovered in the products of thermal decomposition at 800 degrees C. This demonstrates that 2-H-heptafluoropropane experiences not only simple decomposition, but also cyclization and the polymerization reactions under high temperature thermal decomposition conditions.
采用快速热解方法以及傅里叶变换红外光谱（FTIR）和气相色谱/质谱（GC/MS）分析技术，在30秒的反应时间内以及400、500、600、700和800摄氏度的温度下，对2-H-七氟丙烷的热分解过程进行了研究。结果表明，反应温度对2-H-七氟丙烷的热分解有显著影响。2-H-七氟丙烷在前三个温度下较为稳定，而在700摄氏度时开始明显分解，在800摄氏度时发生剧烈分解。同时，在800摄氏度时观察到反应器表面有焦炭形成。此外，在8,00摄氏度热分解产物中首次发现了三种环化合物，即1,2-双（三氟甲基）全氟茚、全氟（1-亚乙基茚）和八氟萘。这表明2-H-七氟丙烷在高温热分解条件下不仅经历简单分解，还经历环化和聚合反应。
