Havrylyuk N. Physico-chemical properties of polytetrafluoroethylene and polypropylene, filled with multilayered carbon nanotubes

In order to create polymer nanocomposites with high mechanical characteristics, carbon nanotube synthesis was optimized using the catalytic chemical vapor deposition from the gas phase method (CVD method) and the characteristics of the nanotubes were analyzed depending on the synthesis conditions: the composition and dispersion of the catalyst, the duration of the production process of CNT, the nature of the precursor - the source of atoms Carbon. Polytetrafluoroethylene and polypropylene nanocomposites filled with them were obtained. The properties of polytetrafluoroethylene filled with CNT content from 0.1 to 25.0% are investigated. It is shown that for this system it is optimal to fill the aqueous suspension of polytetrafluoroethylene with a solution of cavitating CNTs, and the additional stages of purification from mineral impurities and an increase in the number of functional groups on the surface of the CNT are ineffective. Polypropylene nanocomposites with a content of from 0.05 to 5.0% CNTs were extruded from the melt. The thermal characteristics, glass transition temperatures, thermal conductivity, electrical conductivity, crystallinity, the influence effect of electronic irradiation on the lattice parameters, photoluminescence, strength, and the crystal structure of PP/CNT composites were studied. Experience has shown that the presence of CNTs in polymer matrices increases biocompatibility and allows the use of such nanocomposites for endoprosthetics.