Investigation of the Structure and Piezoelectricity of Poly(vinylidene fluoride–trifluroethylene) Copolymer Doped with Different Dyes

Abdelhamid, Mahmoud; Aboelwafa, A. M.; Elhadidy, H.; Habib, A.

doi:10.1080/00914037.2011.593063

Cited by 13 publications

(2 citation statements)

References 33 publications

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“…1 They possess exceptional thermal stability, oil resistance, oxidation resistance and chemical resistance due to the high bond energy (485 kJ mol À1 ) of the C-F bond and the shielding effect of the uorine atoms on the -C]Cbond in its molecular structure. [2][3][4][5] However, they do not fully meet the requirements of modern uoroelastomer transport devices because of the poor processing performance, complicated processing and complex vulcanisation procedure. 6,7 As a result, low-molecularweight uoroelastomers with improved uidity and plasticity, known as liquid uoroelastomers, were developed.…”

Section: Introductionmentioning

confidence: 99%

Structure, preparation and properties of liquid fluoroelastomers with different end groups

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Structure, preparation and properties of liquid fluoroelastomers with different end groups

et al. 2022

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“…Previous study by the authors reported that the DANS dye doped poly(vinylidene fluoride-trifluroethylene) copolymer showed lamella structure and improvement of the piezoelectric and pyroelectric activity of the copolymer takes place [18] .…”

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Structure and Piezoelectricity of Poly (styrene-co-acrylonitrile) Copolymer Doped with Different Dyes

Elhadidy

Abdelhamid

Aboelwafa

et al. 2013

Polymer-Plastics Technology and Engineering

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The influence of the organic ionic salt crystal 4-N,Ndimethylamino-4-N-methyl-stilbazolium tosylate (DAST) and 4-(N,N-dimethylamino)-4 0 -nitrostilbene (DANS) dyes on structure, and piezoelectricity of Poly (styrene-co-acrylonitrile) (SAN) copolymer has been studied by several techniques. X-ray diffraction and optical microscopy reveal crystalline phase in the doped copolymer and the degree of crystallinity increases either by increasing dye's concentration or by applying stress to the films. Fourier Transform Infrared spectroscopy (FTIR) spectra showed that the intensity of the vibrational band of SAN copolymer increased with the dye concentration, indicating the interaction between dyes and the copolymer. The dynamic glass transition temperature (T g ), probed by Thermally Stimulated Depolarization Current (TSDC), related to the segmental mode of SAN (at $373 K) is slightly shifted to lower temperature by adding DANS, while it shifts to higher temperature upon adding DAST ($390 K). Suppression and enhancing in the current intensity of SAN is related to the dipolar strength of dyes.

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Efficient single-crystal 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST) on the optical, piezoelectric coefficient and structure of P(VDF-HFP) copolymer for energy conversion systems

Habib,

Metwally,

Fahmy

2023

Polym. Bull.

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Poly(vinylidene fluoride-co-hexafluoropropylene) P(VDF-HFP) doped with 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST) composites with various concentrations of DAST dye is prepared using the casting method. The crystal structure and optical properties of the pure and P(VDF-HFP)/DAST composites with various contents of DAST dye are investigated using various techniques such as UV–Vis spectroscopy, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and polarized optical microscopy (POM). The analysis of XRD data and FTIR spectra revealed that the β-fraction has been improved in the composite samples with increasing the content of DAST dye. Analysis of UV spectra displayed that the optical band gap of P(VDF-HFP) pure copolymer is 5.41 eV and has been reduced to be 3.75 eV for P(VDF-HFP)/10 wt% DAST that will be suitable for efficient systems of energy conversion and multijunction-based layer solar cells. Also, it is found that the nonlinear and linear optical parameters of the composite samples are DAST dye-dependent. Thermally stimulated depolarization current (TSDC) technique has been applied to investigate the dipolar and space charge relaxations of the composites. Moreover, it is observed that the pyroelectricity and piezoelectricity are enhanced with increasing the content of DAST dye. The highest content of the DAST dye showed maximum values of the pyroelectric and the piezoelectric coefficients of ~ 4 × 10–5 C/m2 K and ~ 34 pC/N at stress of 6.27 × 105 Pa, respectively. Our results of the polymer/dye composites give an opportunity of a promising material for flexible piezoelectricity devices used in many potential applications and energy harvesting systems.

show abstract

Investigation of the Structure and Piezoelectricity of Poly(vinylidene fluoride–trifluroethylene) Copolymer Doped with Different Dyes

Cited by 13 publications

References 33 publications

Structure, preparation and properties of liquid fluoroelastomers with different end groups

Structure, preparation and properties of liquid fluoroelastomers with different end groups

Structure and Piezoelectricity of Poly (styrene-co-acrylonitrile) Copolymer Doped with Different Dyes

Efficient single-crystal 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST) on the optical, piezoelectric coefficient and structure of P(VDF-HFP) copolymer for energy conversion systems

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