Fractal Model of the Nanofiller Structure Affecting The Degree of Reinforcement of Polyurethane–Carbon Nanotube Nanocomposites

A percolation model of nanocomposite reinforcement is under study. It is shown that the degree of reinforcement of polyurethane–carbon nanotube nanocomposites depends on the structure of nanofillers, which are annular formations. This structure is most accurately characterized by its fractal dimension. It is established that the creation of a structure with negative percolation indices allows for a significant increase in the degree of reinforcement of considered nanocomposites at low nanofiller concentrations.