Features of the thermal behavior of PMMA/C60 film composites

Polymethylmethacrylate-based film composites containing small additives of fullerenes (up to 3 wt %) are obtained. The thermal behavior of the obtained materials is studied by DSC in the temperature range from 25 to 130°C. It is found that the character of the DSC curve depends on the composite composition. For films containing up to 0.1 wt % C60, one glass transition temperature (Tgsoft) is observed, while in the case of films with a higher concentration of the filler, two glass transition temperatures (Tgsoft and Tgsolid) are observed. It is found that the dependence of Tgsoft value on the content of fullerenes is nonmonotonic with a minimum at 0.5 wt % of C60.