烟酸锌热分解动力学研究

Study on the kinetics of thermal decomposition of zine nicotinate

采用流变相反应法合成了烟酸锌配合物,用热分析(TG/DTG)、X射线衍射(XRD)技术研究了固态物质烟酸锌在空气中热分解的过程。热分析结果表明,烟酸锌在空气中是一步分解,其失重率与理论计算失重率相吻合。XRD结果表明,烟酸锌分解的终产物为ZnO。用Friedman法和Flynn-Wall-Ozawa(FWO)法求取了分解过程的活化能E,并用多元线性回归法给出了可能的机理函数,由这些方法得到的动力学数据相互比较吻合。

Zine nicotinate was synthesized with the rheological phase reaction method. The thermal decomposition processes taking place in the solid state zinc nicotinate have been studied using TG-DTG and XRD techniques. TG-DTGcurves showed that the decomposition proceeds through one well-defined step in Air. Mass loss of the thermal decomposition of zinc nicotinate is in good agreement with the theoretical mass loss. XRD showed that the final product of the thermal decomposition was ZnO. The activation energies were calculated through the Friedman and Flynn-Wall-Ozawa （FWO） methods, and the possible conversion functions had been estimated through the multiple linear regression method.