氢化聚苯乙烯的热降解动力学模型比较研究

Comparative Study on Thermal Degradation Kinetic Models of Hydrogenated Polystyrene

摘要: 通过聚苯乙烯催化加氢反应得到氢化聚苯乙烯，借助Flynn-Wall-Ozawa、V-W、Friedman等模型分别对热重分析得到的热讲解过程数据进行拟合，再利用复合相对误差函数、误差平方和、Marquardt比例标准偏差导数、绝对误差和、平均相对偏差、G方检验和卡方检验等误差方程对不同模型的拟合效果进行比较。结果表明，Flynn-Wall-Ozawa模型的拟合效果最好，得到的活化能为76.54 kJ/mol。氢化聚苯乙烯的热稳定性优于聚苯乙烯。

Abstract: Hydrogenated polystyrene was prepared by catalytic hydrogenation of polystyrene. The model of Flynn-Wall-Ozawa, V-W and Friedman were used to fit the thermal interpretation process data obtained from thermogravimetric analysis. The fitting ef-fects of different models were compared using error equations, such as composite relative error function, sum of squares of errors, derivative of Marquardt proportional standard deviation, sum of absolute error, average relative deviation, G-square test and chi square test. The results indicated that the Flynn-Wall-Ozawa model has the best fitting effect, and the obtained activation energy was 76.54 kJ/mol. Hydrogenated polystyrene has better thermal stability than polystyrene.