Neat polyurethane (PU) specimens and composites of polyurethane with variable amounts of multiwalled carbon nanotubes\n(MWCNTs) were subjected to tensile tests, stress relaxation tests, and strain rate jumps. Since the already published data about the\neffect of carbon nanotubes addition to polymer matrix are somewhat contradictory, great care was taken to understand the\nmechanical properties of neat PU specimens. the studies revealed that the tensile curves of neat PU are substantially influenced by\nseveral factors, such as strain rate, age, and thickness of the specimens. The addition of MWCNTs into the PU matrix had a\nnegligible effect on the mechanical properties of composites at low strains...............
Loading....