摘要
在单脉冲激波管中研究了有Ｈ２条件下Ｃ２Ｆ４的分解。对于分解反应Ｃ２Ｆ４＋Ａｒ→２ＣＦ２＋Ａｒ，利用ＣＦ２插入Ｈ２的后续结果，产生稳定的ＣＨ４作为上述反应的进行度的标识，结果显示温度在１０００～１０８０Ｋ分解速率与Ｍｏｄｉｃａ和ＬａＧｒａｆ的速率常数相合。直接测定反应后Ｃ２Ｆ４的剩余浓度，则显示有多于直接热解１０倍的Ｃ２Ｆ４消耗。这是由于ＣＦ２与Ｈ２的反应的后果将导致有Ｈ原子释入系统内，它引发了Ｃ２Ｆ４的链式聚合。
The decomposition of C2F4 in the presence of H2 has been studied in asingle pulse shock tube.As the extend of the reaction C2F4+Ar→2CF2+Ar is assigned to the measured concentration of the final stable product CH4 led by the consequence of CF2 insertion into H2,the decomposition rate at temperature range 1000 to 1080K is consistent with the rate constant given by Modica and LaGraff.The direct measurements of the residuary concentration of C2F4 show that in addition to the direct pyrolysis there are 10 times more consumption of C2F4 caused by a polymerization chain initiated by the released H atom in the system as a consequence of the reaction of CF2 with H2.
基金
国家自然科学基金
国防科学技术委员会预研基金
中国科学院"八五"重点项目"燃烧基础问题研究"
中国空气功动力研究与发展中心
关键词
分解
聚合
激波管
四氟乙烯
聚四氟乙烯
Perfluoroethylene Decomposition Polymerization Shock tube
