Dependence of the degree of reinforcement of polymer/carbon nanotubes nanocomposites on the nanofiller dimension

The dependence of the degree of reinforcement of polymethylmethacrylate/carbon nanotubes on the nanofiller content at ultrasmall concentrations of the latter is investigated. It is shown that the extreme character of this dependence is determined by the structural features of the nanofiller. Functionalization of carbon nanotubes gives a positive effect only below their percolation threshold.