Abstract
To estimate the inhibition effect of some polyfluorocarbons containing N, O, or S atoms such as (CF3)3N, (CF3)2NCF2H, (C2F5)2O, CF3SF5, and C2F5SF5 on flame propagation, the laminar burning velocity was measured for mixtures of 9.50 vol% methane, 90.00 vol% air, and 0.50vol% inhibitor and of 1.87 vol% n-heptane, 97.63 vol% air, and 0.50vol% inhibitor. The five compounds have higher ability as fire suppressants than CF3CHFCF3 and CF3H, which have already been put to practical use.