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.

中文翻译：

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聚酰胺6/还原氧化石墨烯纳米复合材料的反应熔融加工及其导电性能

摘要 以工业化的还原氧化石墨烯（RGO）产品为基础，高接枝率制备了具有异氰酸酯基反应位点的RGO-TDI石墨烯前驱体，并通过反应熔融加工制备了一系列PA6/RGO-TDI复合材料。PA6 分子被证实通过共价键和氢键反应嵌入到 RGO 层中，具有高接枝率和层厚，表现出几乎单层分散状态。剥离的RGO-TDI的分子桥效应降低了导电网络形成的活化能，导致复合材料的电导率快速增加，具有低阈值渗透。