N,N'-乙撑双硬脂酰胺的热分解动力学研究

摘要

以TGA-DTA为手段，考察N,N'-乙撑双硬脂酰胺(EBS)在氮气气氛中的热分解行为和分解动力学。用Flynn-Wall-Ozawa、Kissinger和Šatava-Šesták法计算了EBS的热分解动力学参数，并推断了分解机理。结果表明，从519.15 K到723.15 K EBS热分解过程分为两个阶段。两个阶段的表观活化能分别为78.41和88.38 kJ.mol-1，指前因子分别为2.188×108和7.586×108 min-1，热分解机理函数的积分式分别为g(α)=1-(1-α)2和g(α)=α。为进一步开发与利用EBS提供基础数据。%Thermal decomposition characteristics and kinetics of N,N'-ethylenebis(stearamide) (EBS) were investigated under high purity nitrogen atmosphere by DTA-TGA techniques. The thermal decomposition kinetic parameters of EBS were calculated by Flynn-Wall-Ozawa, Kissinger and Šatava-Šesták methods, and the decomposition mechanism was also studied. The results show that the thermal decomposition process contains two stages at 519.15~723.15 K. For the first and second stages, the activation energies are 78.41 and 88.38 kJ . mol-1 respectively, and the pre-exponential factors are 2.188×108 and 7.586×108 min-1, respectively. Moreover, the integral equations for the decomposition mechanism of the two stages are g(α) = 1-(1-α)2 and g(α) = α, respectively. The data obtained provide fundamental information for industry production and application of EBS.