Two commercially available poly (vinylidene fluoride) (PVDF) grades were applied, namely Solef1006 (Solvay, Lyon, France, PVDF1) with a melt flow index of 40 g/10 min (230 °C, 2.16 kg) and Kynar720 (Arkema, Colombes Cedex, France, PVDF2) with a melt flow index of 5–29 g/10 min (230 °C, 5.0 kg). Rheological measurements were performed on pure PVDF materials whereby higher levels of viscosity (see Figure 1 ) and elasticity (see Figures S1 and S3 ) were found for PVDF2 compared to PVDF1.
As electrically conductive fillers, mixtures of branched multi-walled carbon nanotubes (b-MWCNTs) and carbon black (CB) were chosen. The b-MWCNT “CNS flakes” (Applied NanoStructured Solutions LLC, Baltimore, MD, USA) have a diameter of 14 ± 4 nm and length of ≈70 µm (aspect ratio ≈5000) [38 (link)] and are coated with 3 wt % poly (ethylene) glycol. The CB is a highly structured type of the grade Ketjenblack® EC600JD (Akzonobel, Cologne, Germany) with a surface area of 1200 m2/g and a primary particle size d50 of 34 nm (according to the supplier). Scanning electron microscopy images of both fillers are shown in Kunz et al. [26 (link)].
As electrically conductive fillers, mixtures of branched multi-walled carbon nanotubes (b-MWCNTs) and carbon black (CB) were chosen. The b-MWCNT “CNS flakes” (Applied NanoStructured Solutions LLC, Baltimore, MD, USA) have a diameter of 14 ± 4 nm and length of ≈70 µm (aspect ratio ≈5000) [38 (link)] and are coated with 3 wt % poly (ethylene) glycol. The CB is a highly structured type of the grade Ketjenblack® EC600JD (Akzonobel, Cologne, Germany) with a surface area of 1200 m2/g and a primary particle size d50 of 34 nm (according to the supplier). Scanning electron microscopy images of both fillers are shown in Kunz et al. [26 (link)].
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