Measurement of the internal electric field in a ferroelectric copolymer of vinylidene fluoride and trifluoroethylene using electrochromic dyes

Tsutsumi, Naoto; Davis, G. T.; DeReggi, A.S.

doi:10.1021/ma00024a004

Cited by 33 publications

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“…The polymer blend electrolyte comprises at least a first phase adopted to absorb the electrolytes active species and a second phase that is tougher and sometimes substantially inert. The inherent merits of using blend -based polymer electrolytes are exemplified by several research groups [4][5][6]. The problem in choosing polymer blends is the miscibility of the components.…”

Section: Introductionmentioning

confidence: 99%

Ionic conductivity studies in PMMA/PVdF polymer blend electrolyte with lithium salts

Mahendran¹,

Rajendran

2003

Ionics

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Abstract. Batteries using tonically conducting polymer membranes as electrolytes are very attractive, since the concept of power sources capable of combining a high energy content with plasticity is very appealing for the consumer electronics market and in electric vehicle applications. Blend based polymer electrolytes composed of poly (methylmethacwlate) (PMMA), Poly Vinylidene fluoride (PVdF), Lithium salt (LiX) (X = CIO4, BF 4 and CF3SO 3) and Dimethyl Phthalate (DMP) are prepared using solvent casting technique. The films have been characterized using XRD, FTIR, Thermal and SEM studies; the effect of complexing salt and temperature on ionic conductivity is also discussed. The maximum conductivity value obtained for the solid polymer electrolyte film at 303 K is 4.2 x 10 -3 S/cm.

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Section: Introductionmentioning

confidence: 99%

Ionic conductivity studies in PMMA/PVdF polymer blend electrolyte with lithium salts

Mahendran¹,

Rajendran

2003

Ionics

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“…If the polarization induced field Es is simply added toE, !lac should be (10) The above two equations mean that !lac shifts from flaB along the axis of the electric field by the magnitude of the polarization induced electric field.…”

Section: Electro-optical Property Of the Poled Filmmentioning

confidence: 99%

“…Tsutsumi, Davis, and DeReggi used electrochromism of dyes to estimate the local electric field of the polarized P(VDF/TrFE). 10 The local electric field is the sum of the Lorentz field, external electric field, depolarization field and the field from atoms inside the cavity.…”

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confidence: 99%

Liquid Crystal Droplets Dispersed in Ferroelectric Copolymer of Vinylidene Fluoride and Trifluoroethylene

Koda

Morito

Ikeda

2001

Polym J

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ABSTRACT:Microdroplets of antiferroelectric liquid crystal 4-( 1-Methylheptyloxycarbonyl) phenyl 4'-0ctyloxybiphenyl-4-carboxylate(MHPOBC) were dispersed in ferroelectric matrix copolymer of vinylidene fluoride and trifluoroethylene (P(VDFITrFE)) by solvent-induced phase separation. We measured spontaneous polarization, dielectric constant and electro-optical properties of the present composite materials. Discussion is made on how the polarization structure of the ferroelectric matrix affects electro-optical properties of the materials. The polarization of the matrix polymer effectively helps the external field which induces optical switching of the materials.

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“…[2,3] Following these studies, several systems based on PMMA have been applied on other application such as in electrochromic devices. [4,5] Due to its good optical properties, PMMA has become a good candidate for non-liner optical applications in communicational technology. [6] The most serious drawback of plasticized gel-based PMMA system is poor mechanical property [7] and to date this problem remains unsolved.…”

Section: Introductionmentioning

confidence: 99%

The Coagulation Impact of 50% Epoxidised Natural Rubber Chain in Ethylene Carbonate‐Plasticized Solid Electrolytes

Latif

Aziz

Ali

et al. 2009

Macromolecular Symposia

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Summary: In this research, thin, soft and flexible free standing films can be obtained from poly (methyl methacrylate) (PMMA)/50% epoxidised natural rubber (ENR 50)/ lithium triflate (LiCF 3 SO 3 ) blends. However, phase separation is observed on the surface of the films which indicates that the blending is not homogeneous. The blend became more homogeneous when ethylene carbonate (EC) plasticizer is introduced into the blend system. However, the anti-plasticization effect of EC on ENR 50 occurs at lower concentration of EC at which the rubber became coagulated due to immiscibility of the rubber with EC plasticizer during solution casting. These ENR 50 coagulates can be observed as large solid structures in the Field Emission Scanning Electron Microscope (FESEM) micrographs of the EC-plasticized rubber-based electrolytes. The presence of these coagulates, hinder the migration of lithium ions in the system and also trap the lithium ions within the coil. This in turn reduced the number of free lithium ions that contribute to the ionic conduction. As a result, the conductivity of the un-plasticized PMMA/ENR 50/LiCF 3 SO 3 film dropped drastically by two orders of magnitude.

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Measurement of the internal electric field in a ferroelectric copolymer of vinylidene fluoride and trifluoroethylene using electrochromic dyes

Cited by 33 publications

References 0 publications

Ionic conductivity studies in PMMA/PVdF polymer blend electrolyte with lithium salts

Ionic conductivity studies in PMMA/PVdF polymer blend electrolyte with lithium salts

Liquid Crystal Droplets Dispersed in Ferroelectric Copolymer of Vinylidene Fluoride and Trifluoroethylene

The Coagulation Impact of 50% Epoxidised Natural Rubber Chain in Ethylene Carbonate‐Plasticized Solid Electrolytes

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