Abstract
Based on the industrialized reduced graphene oxide (RGO) product, the graphene precursor of RGO-TDI with reactive sites of isocyanate groups was prepared with high grafting ratio, and a series of PA6/RGO-TDI composites were prepared via reactive melt processing. The PA6 molecules were confirmed to reactively intercalate into RGO layers through covalent and hydrogen bonding, which had high grafting ratio and layer thickness, exhibiting almost monolayer dispersion state. The molecular bridge effect of exfoliated RGO-TDI lowered activation energy of electrically conductive network formation, which resulted in a rapid increase of electrical conductivity of the composites with a low threshold percolation.
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