Nucleation of the Electroactive γ Phase and Enhancement of the Optical Transparency in Low Filler Content Poly(vinylidene)/Clay Nanocomposites
By A. Lopes, C. Costa, C. Tavares, I. Neves, S. Lanceros‐Méndez. 2011
286 citations recorded by the source corpus.
Poly(vinylidene fluoride), PVDF, based nanocomposites with different clay structures have been processed by solvent casting and melt crystallization. Depending on the melting temperature of the polymer, the nanocomposite recrystalises in the electroactive γ or nonelectroactive α phase of the polymer. This fact is related to the thermal behavior of the clay. For montmorillonite clay, the full crystallization of the electroactive γ phase occurs for clay contents lower than 0.5 wt %, allowing the nanocomposites to maintain the mechanical properties of the polymer matrix. The electroactivity of the material has been proven by measuring the piezoelectric d33 response of the material. The obtained value of d33 is −7 pC/N, lower than in β-PVDF obtained by mechanical stretching but still among the largest coefficients obtained for polymers. Further, the optical transmittance in the visible range is strongly enhanced with respect to the transmittance of the pure polymer. Finally, it is demonstrated that the nuclea...
Subfields: Biomedical Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/12fb31b2ecbd17d9354db71e90f24fcddc8d173a
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Citations in the corpus
- Properties and Applications of the β Phase Poly(vinylidene fluoride) (2018, methodology): “The melting temperatures of the β crystallites and α phase PVDF are similar at 167–172 °C (Figure 2c), so DSC is used to calculate the crystalline percentage, but not to distinguish these three phases [15,20].”