MINOR DECOMPOSITION CHANNELS OF CH3NH2 AT HIGH-TEMPERATURES

The decomposition of CH3NH2 was investigated behind incident shock wav es in the temperature range from 1750 K to 2450 K at densities between 2.15 to 5.75 . 10(-6) mol/cm(3) with initial concentrations of 9.8 to 52.4 ppm CH3NH2. The ARAS technique was used to monitor the formation of H atoms, and the cw ring dye laser narrow bandwidth absorption for the Q(1) (0,0) line of the A(3) Pi<--X(3) Sigma(-) transition of NH. A direct NH formation in the decomposition of methylamine can be expec ted as k(1c) = (1.6+/-1). 10(13)exp(-(202+/-15) kJmol(-1)/RT) cm(3)mol (-1)s(-1). A direct H forming channel could not be noticed. Its contri bution therefore should be below 2%.