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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CH3ArCH2 NH2 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 5 30 15～ 5 5 6 5 5K ,1～ 3MPa的高压范围内的热裂解温度大约在 6 18 34～6 75 49K ;密闭压力容器中的残碳率为 5 6 2 3 % ,常压下的残碳率为 2 8 96 %～ 36 47% ,而高压下残碳率可达 5 9 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2 0 6 78kJ/mol和 183 93kJ/mol,反应级数n≈ 1.
The thermal cracking behavior of the carbon precursor C3ArCH2 NH2 for carbon / carbon composites was investigated by means of airtight pressure vessel method, atmospheric pressure DSC, high pressure DSC and UV spectrophotometry. The effects of different temperatures , The thermal decomposition temperature and the carbon residue rate of the carbon precursor under different pressures, the apparent activation energy of the pyrolysis reaction was obtained by isothermal kinetics and non-isothermal kinetic method.The experimental results show that the atmospheric pyrolysis temperature is about 5 30 15 ~ 5 5 6 5 5K, the pyrolysis temperature in the high pressure range of 1 ~ 3MPa is about 6 18 34 ~ 6 75 49K; the carbon residue rate in the closed pressure vessel is 56.23% Carbon rate of 2 8 96% ~ 36 47%, while the carbon residue rate under high pressure up to 5 9 11%; according to Kissinger et al. Was obtained under isothermal conditions and non-isothermal conditions apparent thermal activation energy Ea Respectively, 2 0 6 78 kJ / mol and 183 93 kJ / mol, the reaction order n ≈ 1.