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采用差热分析(DTA)技术测定了普通酚醛树脂(PF)和生物油改性PF在固化反应过程中的热行为,综合运用Kissinger方程、Ozawa方程和Crane方程计算出两者的固化反应动力学参数。研究结果表明,普通PF和生物油改性PF的反应级数分别为0.95和0.93,平均活化能分别为118.24kJ/mol和83.62kJ/mol,指前因子分别为8.302×1010s-1和6.235×103s-1;两者的反应级数较为接近,均可归结为复杂反应,说明生物油改性PF和普通PF的固化反应模式基本相同;与普通PF相比,生物油改性PF具有相对较低的平均活化能(即固化能耗相对较低)。
Differential thermal analysis (DTA) was used to determine the thermal behavior of common PF and bio-oil-modified PF during the curing reaction. The kinetics of the curing reaction was calculated using Kissinger equation, Ozawa equation and Crane equation parameter. The results showed that the reaction orders of PF and bio-oil-modified PF were 0.95 and 0.93, respectively. The average activation energies were 118.24 kJ / mol and 83.62 kJ / mol, respectively. The pre-exponential factors were 8.302 × 1010s-1 and 6.235 × 103s-1; the reaction orders of the two are close, all can be attributed to a complex reaction, indicating that the bio-oil modified PF and ordinary PF curing reaction mode is basically the same; compared with the ordinary PF, bio-oil modified PF has a relatively Low average activation energy (ie, curing energy is relatively low).