Semicrystalline Poly(vinylidene fluoride)(PVDF) was melt blended by multiwalled carbon nanotube (MWNT) at various contents (0.01 $ 5 wt%) using internal mixer. The relationships between morphology and physical properties based on PVDF and MWNT were investigated. As the MWNT content is increased, the apparent supercooling required for PVDF crystallization and the size of spherulites in PVDF decrease. In the WAXD profiles, the incorporation of MWNT produced a large shoulder at 2u ¼ 20.78 with increasing the MWNT content, corresponding to the polar b-form crystal of PVDF. The experimental percolation threshold for the electrical conductivity in PVDF was estimated and clearly occured between 2 and 2.5 wt%. Similar tendency was also observed in thermal conductivity and permittivity.

Multi-walled carbon nanotube (MWNT)=Poly(vinylidene fluoride) (PVDF) composites with various loading levels (0.01 $ 10 wt%) have been prepared by the simple melt-compounding approach. Morphology and electrical properties of the composites were investigated. The experimental percolation threshold for the electrical conductivity was estimated and clearly occurred between 2 and 2.5 wt%. MWNT= PVDF composites presented a shoulder posterior to the main melting peak and an increased endpoint of the peak. In the WAXD profiles, the incorporation of MWNT produced a larger shoulder at 2h ¼ 20.7 with increase in the loading levels, corresponding to the b-form crystal of PVDF. In the rheological properties, dynamic viscosity, the extent of shear thinning behaviors and relaxation time were notably increased with the MWNT content.

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Poly(vinylidene fluoride) (PVDF) / multi-walled carbon nanotube (MWNT) thermoplastic composites was melt compounded in an internal mixer. The percolation level for this system in electrical conductivity clearly occured between 2 and 2.5 wt%. PVDF/MWNT thermoplastic composites exhibited an increased crystallization temperature with the loading level, at 10 wt% loading by ca. 6. In addition, they presented a shoulder posterior to the main melting peak and an increased endpoint of the peak. In the Wide Angle X-ray Diffraction (WAXD) patterns, the incorporation of MWNT produced a larger shoulder at 2θ =20.7° with increasing the loading level, corresponding to the β-form crystal of PVDF.