Exfoliating interlayer and nanocompositing of graphite with PVC through solid state shear compounding technology

The graphite-polyvinylchloride(PVC) compounding powders were successfully prepared by solid state shear compounding technology (S³C) at ambient temperature, and then the graphite-PVC/PVC nanocomposites were processed by moulding. The structure and antistatic performance of graphite-PVC compounding powder and nanocomposites prepared through S³C based on pan-milling were investigated by XRD, SEM, TEM and electrical resistivity tests. The results show that the conductivity properties of graphite/PVC nanocomposites prepared through S³C based on pan-milling 20 cycles at ambient temperature are remarkably improved. The surface resistivity of graphite-PVC/PVC nanocomposites with 2% mass fraction of graphite is 4.6×10⁷ Ω·cm. The surface resistivity of graphite-PVC/PVC nanocomposites with 10% mass fraction of graphite reaches lowest as 4.1×10⁴ Ω·cm. The strip flake of graphite particles with thickness less than 20 nm and the aspect ratio of 10 times disperses homogeneously in the PVC matrix.