通过二级、三级引发反应动力学机理建立了相应的分子量分布半经验模型,借助GPC分子量分布实测数据修正了模型参数,其中以三级引发反应动力学为基础建立的分子量分布模型较好地与实验数据相吻合,平均相对误差小于10%。使用该模型可以对聚合工艺进行设计、模拟和优化,并将有助于聚苯乙烯树脂分子设计的探索。 The corresponding semi-empirical model of molecular weight distribution was established by the second- and third-order reaction kinetic mechanism. The model parameters were corrected by the measured data of GPC molecular weight distribution. The molecular weight distribution model based on the third-order reaction kinetics was better In agreement with the experimental data, the average relative error is less than 10%. The model allows the design, simulation and optimization of polymerization processes and will facilitate the exploration of molecular design of polystyrene resins.