不同压力环境下不透明非碳化ABS材料的热解温度模型研究

在不同热流强度下,利用智能步进低压实验仓对不透明非碳化聚合物材料丙烯腈-丁二烯-苯乙烯(ABS)在不同压力情况下的热解过程中的表面及背面温度进行了实时测量,建立了表面吸收一维热解模型,预测了ABS在不同外界热流密度下,不同压力环境下表面温度及背面温度随时间的变化;并将实验测量值与模型模拟值进行对比。结果表明,非碳化聚合物的表面吸收一维热解模型在高热流密度下对温度的预测情况优于在低热流密度下对温度的预测结果,总体来说,模拟计算结果与实验测量值较为一致。

Pyrolysis temperature model of opaque non-charring ABS under different pressures

A series of experiments on the opaque Acrylonitrile Butadiene Styrene (ABS) in reduced low-pressure chamber have been conducted in this work to study the pyrolysis of this polymer under different external heat fluxes. The variation of temperature at the surface and bottom of the sample during the whole process has been measured. A surface absorption one-dimension numerical model is developed to predict the surface and bottom temperature of ABS in a series of reduced pressures under different external heat fluxes. The model is verified by the measured experimental data. The results indicates that the theoretical result of temperature under higher heat flux is better than that under lower heat flux. The experimental results fit well with the theoretical results.