The kinetics data of ultraviscous li-quids of polymers were fitted using the diverging Vo-gel-Fulcher-Tammann(VFT)equation and the non-diverging Bässler-Avramov and Mauro-Yue-Ellison-Gupta-Allan equations.Due to the fact that relaxation time data was more accurate than viscosity data,it was designated as the fitting object.In order to make the fitting results physically meaningful,the fitting values of the infinite high-temperature relaxation time were kept within a reasonable range.The error analysis of the fitting results showed that the fitting accuracy of the VFT equation for most relaxation time data of polymers was higher than those of the non-diverging equations.The glass transition tem-peratures of the studied subcooled liquid were pre-dicted by using the fitted parameters,and the results showed that the predicted values of the VFT equation were consistent with experimental values and supe-rior to non-diverging equations.The VFT equation was most suitable for describing the kinetic behavior of subcooled liquids of polymers.
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