FEATURES OF THE FORMATION OF THE STRUCTURE OF POLYMER NANOCOMPOSITES BASED ON POLYAMIDE 6 IN THE PROCESS OF THEIR CRYSTALLIZATION

The article presents the results of studies of the structure formation patterns of polymer nanocomposites based on polyamide 6 filled with carbon nanotubes. The data were obtained in the course of experimental and computational studies with varying the mass fraction of the filler — from 0.2 to 4.0% and the cooling rate of the composite from the melt — from 0.5 K/min to 20 K/min. Theoretical studies to determine the mechanisms of structure formation of nanocomposites were based on the analysis of experimentally obtained crystallization exotherms. At the initial stage of crystallization, the mechanisms of structure formation are established according to the nucleation equation, at the stage of crystallization in the volume of the composite — within the framework of the modified Kolmogorov — Avraami equation. The presence of two mechanisms of structure formation — planar and volumetric — is shown.