时间参量法——Ⅳ.简单级数反应的双谱法

Time Parameter Method——Ⅳ. Double - Thermoanalytical - Curve Method for Simple Order Reactions

根据简单级数反应的热动力学方程,提出了一种新的热谱曲线解析方法——简单级数反应的双谱法.该法利用两张热谱曲线的特征热谱数据α_m^(?),Δ_m,和t_m,便能以简单的数学形式计算出化学反应的速率常数.实验结果验证了方法的正确性.

According to the thermokinetic equations of simple order reactions, a novel thermokinetic research method for simple order reactions-the double - thermoanalytical - curve method is proposed in this paper. The method only needs characteristic data ( αm*,△m and tm) of two thermoanalytical curves measured at different initial concentrations of reactants to calculate the rate constants of the studied reaction systems. Its mathematical model is kn = ( C011-n ?c021-n)/(Φml -Φm2) . In order to test the validity of this method, the saponification of ethyl butyrate and ethyl benzoate in aqueous ethanol solvent, the hydrolysis of epichlorohydrin catalyzed by HBr in aqueous solution and the polymerization of acrylamide have been studied. The experimental results indicate that the double - thermoanalytical -curve method for simple order reactions is correct.