【摘要】 :用膨胀法测定了 2 ,3-二氰基 - 2 ,3-二 (p ,m -甲氧基苯基 )丁二酸二乙酯 (meso/dl=0 .15 6 9)在苯乙烯中的分解动力学 .与以前的实验结果相比较 ,dl异构体含量增加 ,分解活化能增大 .所得活化参数Ed =88.5 4kJ/mol,ΔS≠ =- 5 8.78J/mol.K .更多还原

【Abstract】 The kinetics of thermal decomposition of diethyl 2,3-dicyano-2,3-di(p,m-dimethoxy phenyl) succinate(ECMS,meso/dl=0.1569) in styrene at different temperatures was measured by means of dilatometry. As compared with the earlier experiment, it is found that the decomposition activation energy increases with growing in number of dl isomer in ECMS. The activation parameters are: Ed=88.54KJ/mol, ΔS≠-58.78J/mol·K.更多还原