论文部分内容阅读
从弱酸电离的介貭效应讨论了唐敖庆的聚酯反应动力学方程。由于在缩聚过程中介貭性貭的改变,反应体系中羧酸的电离常数K_e不可能维持恒定,因此二级半动力学方程不能确立。实验数据说明K_e确是反应程度的函数。当反应程度在0.65以上时反应体系的电导已极小。用乙二醇与己二酸聚酯化反应得到的动力学数据并不完全符合二级半动力学方程。
Tang Aoqing’s polyester reaction kinetics equation was discussed from the mediation effect of weak acid ionization. The second-order half-kinetic equation can not be established because the ionization constant K_e of the carboxylic acid in the reaction system can not be kept constant due to the change of the mediator 缩 in the polycondensation process. Experimental data show that K_e is indeed a function of the degree of reaction. When the reaction degree is above 0.65, the conductance of the reaction system has been very small. The kinetic data obtained by the polyesterification of ethylene glycol and adipic acid do not fully comply with the second-order half-kinetic equation.