Piezoelectricity in crystallizing ferroelectric polymers: Poly(vinylidene fluoride) and its copolymers (A review)

  title={Piezoelectricity in crystallizing ferroelectric polymers: Poly(vinylidene fluoride) and its copolymers (A review)},
  author={Valentin V. Kochervinskii},
  journal={Crystallography Reports},
The piezoelectricity observed in poly(vinylidene fluoride) (PVDF) and its copolymers involves three components that are associated with the presence of at least two phases (crystalline and amorphous) in the polymer structure. The main contributions to the phenomenon observed are made by the size effect and electrostriction, which are related to each other. These contributions manifest themselves through the mechanism of strain-induced reversible transformations of a number of domains of the… Expand
Variations in polymeric structure of ferroelectric poly(vinylidene fluoride) films during annealing at various temperatures
To clarify the thermal degradation mechanisms of uniaxially drawn poly(vinylidene fluoride) (PVDF) films, variations due to annealing in the polymeric structures of the films were investigated usingExpand
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Vinylidene fluoride (VDF)/tetrafluoroethylene (TFE) 94/6 copolymer films obtained by low-temperature crystallization from acetone solution and by melt-crystallization under high pressure wereExpand
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Piezoelectricity, pyroelectricity, and the electrostriction constant of poly(vinylidene fluoride)
A new device for measuring the electrostriction constant of polymer films is described. Observed values for various polymers except poly(vinylidene fluoride) and poly(methyl methacrylate) agree wellExpand
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Abstract The copolymers of vinylidene fluoride (VDF) and trifluoroethylene (TrFE) have been found to be effective ultrasonic transducer materials because of their large electromechanical couplingExpand
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Abstract Electrostriction constant (K31) and Poisson's ratio of a film (μ31, μ21) and that of a crystal (μ′) were measured for uniaxially drawn and rolled poly(vinylidene fluoride) films. The highlyExpand
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Physical basis for piezoelectricity in PVDF
Abstract Consideration of the molecular and bulk structures of PVDF and related semicrystalline polymers, and the effects of processing to make transducer films, leads to a novel way of analysing theExpand
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The orientation of the noncrystalline (amorphous) phase in poly(ethylene terephthalate) fibers is analyzed by separating the amorphous scattering in the wide-angle x-ray diffraction patterns intoExpand
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