INFLUENCE OF MOISTURE ON THE MECHANICAL AND BARRIER PROPERTIES OF MULTILAYER AROMATIC POLYAMIDE NANOCOMPOSITE FILMS

摘要

Multilayer nanocomposite films containing nylon MXD6 as a barrier layer were produced through co-extrusion and stored at elevated temperatures for various periods of time. Dramatic changes in the mechanical properties and moisture content of these films were observed after storage for 3 days at 140°F. Glass-transition temperature increases of 20-40°C were observed in the films after storage, and mechanical testing revealed a shift from ductile to brittle failure as storage time and nanocomposite layer thickness increased.