Effect of tensile strain rate and elongation on crystalline structure and piezoelectric properties of PVDF thin films

By B. Mohammadi, A. Yousefi, S. M. Bellah. 2007

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Properties and Applications of the β Phase Poly(vinylidene fluoride) (2018, background): “The α to β phase conversion can be realized below 100 °C stretching temperatures, and about 3–5 stretch ratio in many studies [4,29,34,35], and the thickness of the prepared β phase PVDF films can range between several μm to hundreds μm.”
Effect of annealing on phase transition in poly(vinylidene fluoride) films prepared using polar solvent (2011, background): “Mohammadi et al (2007) have shown the effect of stretch rate on conversion of α-phase to β-phase (Sajkiewicz et al 1999).”
A Review of Piezoelectric PVDF Film by Electrospinning and Its Applications (2020, unknown): “The polar crystal structure (β, γ, δ) defines the electroactive properties, where all the dipoles are parallel, ensuing a non-zero dipole moment [25].”
Exceptional dielectric properties of chlorine-doped graphene oxide/poly (vinylidene fluoride) nanocomposites (2015, background): “3 [52–54], suggesting predominant a/c phases together with a small fraction of b-phase.”