Investigation of Changes in the Degree of Crystallinity of Polyamide-6

Samples of high-viscosity polyamide-6 granulate were investigatied by differential scanning calorimetry: (1) industrial production granulate, (2) granulate after the process of combined drying-demonomerization, (3) granulate after consecutively carried out processes of combined drying-demonomerization and remelting. The temperatures and enthalpies of melting of the original and subjected to technological thermodynamic processes polymers were determined. Changes in the crystal structure of the polymer during the combined drying-demonomerization and remelting processes have been proven. The effect of the content of low molecular weight compounds and the temperature parameters of the above processes on the degree of polymer crystallinity is shown.