KINETICS OF MELT CRYSTALLIZATION OF POLYPROPYLENE USING KISSINGER'S METHOD

摘要

Kissinger's method of kinetic analysis was applied to melt crystallization of polymers upon cooling. The rate of crystallization was expressed as a function of the un-crystallized component and the temperature difference between melting and crystallization. Using a modified expression for the rate constant, a relationship is obtained to correlate an apparent energy for crystallization with the cooling rate and the temperature difference between melting and crystallization. This relationship allows analysis of non-isothermal crystallization of polymer melt. Using differential scanning calorimetry (DSC) to obtain thermograms at different cooling rates, the kinetics of crystallization can be analyzed. The crystallization rate of some commercial polypropylene resins was compared. It was shown that this analysis correlates well with the resin characteristics from DSC.