Morphology and Physical Properties of Binary Blend Based on PVDF and Multi‐Walled Carbon Nanotube

Abstract

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.

Relationship between processing conditions, defects and thermal degradation of poly(vinylidene fluoride) in the β-phase

“…The results will be discussed on the basis of the differences in morphology, amount of defects and chemical structure of the PVDF samples. This research is relevant as different processing conditions and the processing of the material with inclusion of nanoparticles and nanotubes are being studied in order to increase the multifunctional properties of b-PVDF [8,9].…”

Electrical properties of multi walled carbon nanotubes/ poly(vinylidene fluoride/trifluoroethylene) nanocomposites

“…%). PVDF/MWCNT nanocomposites prepared by melt blending were also studied [18,19]. The percolation level in electrical conductivity was found to occur between 2 and 2.5 wt.…”

Characteristic Features of the Thermophysical Properties of a System Based on Polyethylene Oxide and Carbon Nanotubes

“…The value of the percolation threshold turned out to be smaller than for the majority of polymer-carbon nanotubes systems. Thus, the percolation threshold for the polyvinylidene fl uoride-carbon nanotubes system was p cr = 3% [21], and for the ethylene terpolymer-carbon nanotubes system p cr = 2.2% [20], however, it turned out to be commensurable with the data for the polyethylene-carbon nanotubes system where the percolation threshold was 0.72% [18]. Such discrepancies are attributed to the different methods of preparation of polymer nanocomposites and different dimensions and types of nanotubes and are indicative of the different processes of their aggregation.…”