苯乙烯溶液聚合过程变量仿真与优化研究

Simulation and Optimization of Styrene Solution Polymerization Process Variables

由于经典动力学模型的复杂性和精确性,对于预测自由基聚合过程中单体转化率一直是一个挑战。本研究通过响应面法的中心复合设计(CCD)模型进行实验设计、建模和工艺优化,研究了以丙酮为溶剂的苯乙烯溶液聚合过程中单体转化率的变化。建立的优化条件为:反应时间30 min,反应温度120℃,引发剂浓度为0.1135 mol/L,单体转化率为76.82%,观察得到的转化率为70.86%。从而得到了一个非常适合于常规工业使用的预测单体转化率的鲁棒模型。

Due to the complexity and accuracy of the classical kinetic model,it is always a challenge to predict the monomer conversion in the process of free radical polymerization.In this study,the central composite design(CCD)model of response surface method was used for experimental design,modeling and process optimization,and the change of monomer conversion during the polymerization of styrene solution in acetone was studied.The optimized conditions were as follows:reaction time 30 min,reaction temperature 120℃,initiator concentration 0.1135 mol/L,monomer conversion 76.82%,and observed conversion 70.86%.Thus,a robust model for predicting monomer conversion is obtained,which is very suitable for conventional industrial use.