采用Friedman法求解了硼酚醛-环氧树脂体系的固化反应动力学参数及固化机理模型,预测了170℃硼酚醛-环氧树脂体系的等温固化曲线,确定了此体系的等温理论转化率与时间的关系,得到不同时间的理论转化率.并且采用170℃的电热鼓风干燥箱对此体系做等温固化试验,取不同固化时间的试样,用差示扫描量热仪测得树脂的实验转化率,并且与理论值进行比较.结果表明,硼酚醛-环氧树脂体系的固化反应模型属于An型,固化反应机制函数为[-ln(1-α)]~(1.39)=1.80×10~(-4)t,在低固化阶段,理论转化率与实验转化率相接近,但随着固化程度的增加,理论值明显高于试验值.
The thermal curing kinetics parameters and model of Boron modified phenolic-epoxy resin system were predicated by the Friedman method.The isothermal curing diagram was plotted and the theoretical conversion ratio at 170 ℃ was obtained by heat flux and temperature datum' s nonlinear regress.The different curing time stage' s Boron modified phenolic-epoxy resin was obtained by drier at 170 ℃, and the experimental conversion ratio was measured by differential scanning calorimetry.The results show that the curing reaction model is An type and the mechanism function is[-ln(1-α)],~(1.39) = 1.80 × 10~(-4) t.The theoretical conversion ratio is closed to the experimental value at the low curing stage, but the theoretical value is higher than the experimental value with the increase of conversion ratio.
参考文献
| [1] | 王勇.甲基丙烯酸二甲胺基乙脂（DMAM）固化环氧树脂的研究[J].热固性树脂,1997(04):8. |
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