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采用非等温差热分析(DTA)研究了竹粉(PB)对液化竹基酚醛树脂(PBF)固化行为及固化动力学的影响,求出固化反应的表观活化能、反应级数及频率因子等参数,进而建立了复合体系的固化反应动力学模型。实验结果表明:加入竹粉后,体系的固化峰顶温度、表观活化能、反应级数和频率因子分别降低至110.5℃、57.27kJ.mol-1、1.0079、1.99×105 s-1(纯PBF树脂的上述指标分别为122.5℃、63.46 kJ.mol-1,1.0173和8.04×105 s-1),竹粉的加入加速了PBF的固化反应过程。
The effect of bamboo powder (PB) on the curing behavior and curing kinetics of liquefied bamboo based phenolic resin (PBF) was studied by non-isothermal differential thermal analysis (DTA). The apparent activation energy, reaction order and frequency factor And other parameters, and then established a composite curing reaction kinetics model. The experimental results showed that the curing peak temperature, apparent activation energy, reaction order and frequency factor decreased to 110.5 ℃, 57.27kJ · mol-1, 1.0079, 1.99 × 105s-1 The above indexes of PBF resin were 122.5 ℃, 63.46 kJ · mol-1, 1.0173 and 8.04 × 105 s-1, respectively. The addition of bamboo powder accelerated the curing reaction of PBF.