用非等温DSC曲线确定Ln(NCS)3-·4C3H5CH2NH2的热分解反应机理函数及热分解反应动力学参数

本文利用非等温DSC曲线对十二种镧系元素异硫氰酸盐与苄胺形成的配合物Ln(NCS)3·4C6H5CH2NH2(Ln=La、Pr、Nd、Sm、Eu、Ge、Tb、Dy、Ho、Er、Tm、Yb)进行了非等温动力学研究, 并运用积分法和微分法进行了分析, 推断了它们的热分解反应机理函数。

The determination of the most probable mechanism functions and kinetic parameters of the thermal decomposition reaction of complexes of rare earth isothiocyanates with benzylamine by non-isothermal DSC curves

The thermal decomposition of the complexes Ln(NCS)34C6H5CH2NH2 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb) was studied under non-isothermal condition by DSC curves. Kinetic parameters were obtained from anal. of the DSC curves by the integral and differential methods. Their kinetic equations may be expressed as: da/dt = Ae-E/RT(3(1-a)2/3) when Ln = La, Pr, Nd, Sm, Eu, Gd and da/dt = Ae-E/RT((1-a) when Ln = Tb, Dy, Ho, Er, Tm, Yb. The math. expression of the kinetic compensation effect of these thermal decomposition reactions was obtained. Possible mechanisms are suggested.