双酚A与碳酸二苯酯酯交换反应动力学研究进展

综述了双酚A与碳酸二苯酯熔融酯交换制备聚碳酸酯的反应动力学模型的研究进展,对官能团模型和分子碎片模型两种比较成功的动力学模型进行了详细的说明.介绍了一种新的四面体中间物模型,并对由不同模型导出的动力学方程式的计算结果与实验结果进行了讨论和比较.通过官能团模型可以得到反应级数,活化能,反应速率常数以及平衡常数,分子碎片模型最显著的优势是可以随时跟踪物质的浓度变化,进而得到物系的分子量分布和平均分子量,四面体中间物模型的计算结果与已有的实验数据符合良好,同时对动力学的进一步研究提出了改进方向.

Research Progress on Reaction Kinetics of Transesterification of Bisphenol-A with Diphenyl Carbonate

The research on reaction kinetic model of polycarbonate by melt transesterification of bisphenol-A with diphenyl carbonate was summarized in this text.Two successful models,the functional group model and the molecular species model were explained in detail.A new tetrahedral intermediate model was also introduced.The calculating results of kinetic equations that educed from different models were discussed and compared with the experimental data.The reactive order,activation energies,rate constants and equilibrium constants can be gained via the functional group model.The most prominent advantage of the molecular species model was the concentration of materiel can be tracked at any moment,so the distribution of molecular weight and average molecular weight can be figured out sequentially.The applicability of the tetrahedral intermediate model was justified by fitting it to the available experimental data.Several amendatory aspects about further research on kinetics were also mentioned.