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Keywords:

  • electrical conductivity;
  • Multi-walled carbon nanotube;
  • permittivity;
  • poly(vinylidene fluoride);
  • Supercooling

Abstract

Semicrystalline Poly(vinylidene fluoride)(PVDF) was melt blended by multi- walled 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 2θ = 20.7° with increasing the MWNT content, corresponding to the polar β-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.