Key words: nanocomposite, single-walled carbon nanotubes, suspensions, supercritical impregnation, polymethylmethacrylate, supercritical carbon dioxide, Raman spectroscopy, thermogravimetry, differential scanning calorimetry
A technique is described for dispersing single-walled carbon nanotubes to obtain stable suspensions with a high concentration of individual nanotubes in 2-pyrrolidone. The resulting suspensions were investigated using Raman spectroscopy and were used to modify poly(methylmethacrylate) samples with average molecular weights 15000 and 996000 g/mol by impregnation in supercritical carbon dioxide. The thermal properties of the obtained composite materials are studied. It is shown that the glass transition temperatures of the samples are increased with comparison with the initial polymers. Glass transition temperatures of composites increased by 26°С and 32°С for PMMA with an average molecular weight of 15000 and 996000 g/mol accordingly.
doi:10.34984/SCFTP.2021.16.1.001