Piezoelectric properties of rolled vinylidene fluoride and trifluoroethylene copolymer

Yagi, Toshiharu; Higashihata, Yoshihide; Fukuyama, Koji; Sako, Junichi

doi:10.1080/00150198408012771

Cited by 29 publications

(8 citation statements)

References 8 publications

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“…The measured coercive field and piezoelectric constant are in good agreement with the literature (Ref. 36). For understanding the origin of the piezoelectricity the local piezoelectricity should be imaged with molecular resolution.…”

Section: Thin Films Of Vinylidene Fluoride-trifluoroethylene (Vdf-trfe)supporting

confidence: 88%

Investigation of polymer surfaces using scanning force microscopy (SFM) “a new direct look on old polymer problems”

Grim

Brouwer

Seyger

et al. 1992

Makromolekulare Chemie. Macromolecular Symposia

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In this contribution, the general concepts of force microscopy will be presented together with its application to polymer surfaces (Ref.l). Several examples will be presented to illustrate that force microscopy is a powerful and promising tool for investigation of (polymer) surfaces, such as the imaging of polymer single crystals and the surface structure of thin films of piezo-and pyroelectric block copolymers. Individual molecules were resolved in the case of polytetrafluoroethylene and doublestranded circular DNA, without any particular surface treatment.

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Section: Thin Films Of Vinylidene Fluoride-trifluoroethylene (Vdf-trfe)supporting

confidence: 88%

Investigation of polymer surfaces using scanning force microscopy (SFM) “a new direct look on old polymer problems”

Grim

Brouwer

Seyger

et al. 1992

Makromolekulare Chemie. Macromolecular Symposia

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show abstract

“…Among those, the VDF content is especially important [40,50,52]. For instance, a copolymer sample with 0.7e0.8 (mole fraction) of VDF shows a clear and discontinuous first-order transition between the LT and HT phases at temperature close to the melting point [49,53]. A sample with 0.5e0.6 (mole fraction) of VDF, however, shows more complicated transition behavior [30,40,45,49,50,52,54].…”

Section: Introductionmentioning

confidence: 99%

Structure, phase transition and electric properties of poly(vinylidene fluoride-trifluoroethylene) copolymer studied with density functional theory

Fan

Wang

et al. 2007

Polymer

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“…Since the initial study about the strong piezoelectricity and pyroelectricity properties of poly(vinylidene fluoride) (PVDF) and its copolymer poly(vinylidene fluoride‐ co ‐trifluoroethylene) [P(VDF‐ co ‐TrFE)] in the 1970s,1–4 PVDF and P(VDF‐ co ‐TrFE) have attracted considerable interests for their various device applications such as electromechanical sensors and aculators 5. Several years later, excellent ferroelectricity was disclosed in P(VDF‐ co ‐TrFE) by the existence of a Curie temperature at which the crystals undergo a ferroelectric‐to‐paraelectric phase transition in a wide range of the VDF composition ratio 6–13.…”

Section: Introductionmentioning

confidence: 99%

Crystal phase of poly(vinylidene fluoride‐co‐trifluoroethylene) synthesized via hydrogenation of poly(vinylidene fluoride‐co‐chlorotrifluoroethylene)

Zhang

Xia

Zhu

et al. 2012

J of Applied Polymer Sci

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Trifluoroethylene addition and thermal treatment induced crystal phase transition in a series of poly(vinylidene fluoride-cotrifluoroethylene) [P(VDF-co-TrFE)] containing varied TrFE molar ratio (6,9,12, and 20 mol %) prepared from the hydrogenation of poly(vinylidene fluoride-co-chlorotrifluoroethylene have been investigated by means of Fourier transform infrared spectral (FTIR), Xray diffraction (XRD), and differential scanning calorimetry (DSC) analyses. The comprehensive applications of the three techniques could distinguish a, b and c phase of P(VDF-co-TrFE) very well. The multipeak fitting technique of DSC is successfully applied to calculate the percentage of different phases in the samples, which allows us to investigate the phase transition process of P(VDF-co-TrFE) precisely. It is found that the crystal phase of P(VDF-co-TrFE) films is turned from a þ c phase (6 mol % TrFE) to a þ c þ b phase (9 and 12 mol % TrFE) to b phase (20 mol % TrFE) at high temperature, and from a þ c phase (6 mol % TrFE) to c þ b phase (9 mol % TrFE) to b phase (>12 mol % TrFE) at low fabricated temperature. Both the fabrication conditions and TrFE addition are responsible for the crystal phase transition of the hydrogenised P(VDF-co-TrFE).

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Piezoelectric properties of rolled vinylidene fluoride and trifluoroethylene copolymer

Cited by 29 publications

References 8 publications

Investigation of polymer surfaces using scanning force microscopy (SFM) “a new direct look on old polymer problems”

Investigation of polymer surfaces using scanning force microscopy (SFM) “a new direct look on old polymer problems”

Structure, phase transition and electric properties of poly(vinylidene fluoride-trifluoroethylene) copolymer studied with density functional theory

Crystal phase of poly(vinylidene fluoride‐co‐trifluoroethylene) synthesized via hydrogenation of poly(vinylidene fluoride‐co‐chlorotrifluoroethylene)

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