The crystallization kinetics of polyamide-12

The crystallization kinetics of polyamide-12 has been investigated using a combination of differential scanning calorimetry (DSC) and hot-stage optica l microscopy. The DSC data for isothermal crystallization were consistent w ith a simple two-parameter Avrami model for isothermal crystallization and optical measurements of the spherulite growth rates and nucleation density. On the basis of semiempirical expressions for these quantities, it is show n that with small adjustment, the model can also account for DSC data for n onisothermal crystallization, provided that corrections are made for the dy namic heat balance between the sample and the BSC oven.