Studies on pyrolysis properties and kinetics of carbon matrix precursor CH3ArCH2NH2

Pyrolysis behavior of carbon matrix precursor CH3ArCH2NH2 used for preparin g C/C composites by rapid densification process was investigated by closed- pressure-vessel method, DSC, high-pressure DSC methods and ultraviolet spec trophotometric method. The pyrolysis temperatures and carbon residual ratio s of the compound at different temperatures and different pressures were de rived and the apparent activation energy was also obtained by isothermal dy namic and non-isothermal dynamic method. The experimental results are as fo llows: at the atmospheric pressure, the pyrolytic temperature is about 530. 15-547.15 K; at the pressure as high as 1-3 MPa, the pyrolytic temperature is about 618.34-675.49 K. The carbon residual ratios in the closed pressure vessel, at the atmospheric pressure and at a high pressure are 56.23%, 28. 96%-36.47% and 59.11% respectively. Based on Kissinger's method and the res ult of isothermal experiment, the apparent activation energies of the pyrol ysis reaction under the isothermal and non-isothermal conditions are 206.78 kJ/mol and 183.93 kJ/mol respectively, and the reaction order n approximat e to1.