碳前驱体CH3ArCH2NH2的热解性能及动力学研究

通过密闭压力容器法、常压DSC、高压DSC及紫外分光光度定量分析法等实验手段，对液相沉积法制碳／碳复合材料用碳前驱体CH3ArCH2NH2的热裂解行为进行了研究，获得不同温度、不同压力下该碳前驱体的热分解温度和残碳率，用等温动力学和非等温动力学方法获得了热裂解反应的表观活化能，实验结果表明，常压热裂解温度大约为530．15－556．55K，1－3MPa的高压范围内的热裂解温度大约在618．34－675．49K，密闭压力容器中的残碳率为56．23％，常压下的残碳率为28．96％－36．47％，而高压下残碳率可达59．11％，根据基辛格等方法获得了等温条件下和非等温条件下热裂解反应的表观活化能Ea分别为206．78kJ/mol和183．93kJ/mol, 反应级数N~1.

Studies on Pyrolysis Properties and Kinetics of Carbon Matrix Precursor CH3ArCH2NH2

Pyrolysis behavior of carbon matrix precursor CH3ArCH2NH2 used for preparing C/C composites by rapid densification process was investigated by closed-pressure-vessel method, DSC, high-pressure DSC methods and ultraviolet spectrophotometric method. The pyrolysis temperatures and carbon residual ratios of the compound at different temperatures and different pressures were derived and the apparent activation energy was also obtained by isothermal dynamic and non-isothermal dynamic method. The experimental results are as follows: 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 result of isothermal experiment, the apparent activation energies of the pyrolysis reaction under the isothermal and non-isothermal conditions are 206.78 kJ/mol and 183.93 kJ/mol respectively, and the reaction order \{n≈1\}.