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Preparation, microstructure, and electrochemistry of microporous polymer electrolytes based on poly(vinylidene fluoride-co-hexafluoropropylene)Chen, Yung-Hao 17 January 2003 (has links)
Abstract
In this study, we discuss the properties of gel polymer electrolytes based on poly( vinylidene fluoride-co-hexafluoropropylene ) (PVdF-HFP) with different preparing methods. Thermal properties by TGA and DSC, microstructure by XRD, pore size and porosity of the films by SEM, and electrochemistry by impedance analyzer and charging/discharging systems were investigated.
From the TGA results, the addition of plasticizer or silica makes the decomposition temperature (Td) lowering about 2-6oC. At the same time, in DSC results, it lowers the melting temperature (Tm) about 16-20oC and crystallinity (£GH) about 2-3 J/g. Changing the solvent or non-solvent does not affect Tm and £GH much. In X-ray results, the addition of plasticizer or silica shows peak-broadening effect. After the films absorbing electrolytic solution, the peak-broadening effect is obvious. The solvent or non-solvent effects are more obvious due to the presence of the electrolytic solution.
In SEM and conductivity results, the addition and extraction of the plasticizer helps to the pore formation, but the influence is limited. The effect is strengthened as the silica adds. The existence of plasticizer helps to increase the conductivity. It has one or two order of magnitude higher than other films, exceeding 10-3 S/cm. The silica helps the film to absorb electrolytic solution over 100 wt% and increases the conductivity to exceed 10-3 S/cm in the presence of plasticizer. In non-solvent effect, the films using propanol or octanol as a non-solvent have higher pore size and porosity. At the same time, they absorb electrolytic solution over 100 wt% and have the conductivity about 10-3 S/cm. The films using cyclohexane as a non-solvent have the smallest pore size, porosity, and conductivity. In solvent effect, the films using MEK as a solvent have the smallest porosity and conductivity. The films using acetone as a solvent have higher porosity and conductivity because of its low boiling temperature.
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A study of the rates of reaction between certain electrolytes in solution and the effect of neutral salts thereonMrgudich, John Neil January 1930 (has links)
No description available.
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The conductivity (and viscosity) of some formates and of hydrogen chloride in (anhydrous) formie acid Cases of apparent agreement of strong electrolytes with the mass law ...Martin, Arthur Wesley, January 1914 (has links)
Thesis (Ph. D.)--University of Chicago, 1914.
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The electrical conductivity of certain salts in pyridineAnderson, Edward X., January 1915 (has links)
Thesis (Ph. D.)--University of Iowa, 1915. / Biography. Reprinted from the Journal of physical chemistry, v. 19, no. 9, December, 1915.
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The conductivity (and viscosity) of some formates and of hydrogen chloride in (anhydrous) formie acid Cases of apparent agreement of strong electrolytes with the mass law ...Martin, Arthur Wesley, January 1914 (has links)
Thesis (Ph. D.)--University of Chicago, 1914.
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Der gesamtwiderstand einer elektrolytischen zelle und der widerstand des darin befindlichen elektrolyten ... mit 21 figurenPercy, Rudolf Hans, January 1922 (has links)
Inaug.-diss.--Basel. / Vita. "Literaturverzeichnis": p. [7]-18.
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The electrical conductivity of certain salts in pyridineAnderson, Edward X., January 1915 (has links)
Thesis (Ph. D.)--University of Iowa, 1915. / Biography. Reprinted from the Journal of physical chemistry, v. 19, no. 9, December, 1915.
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An improved method for determining the equivalent conductances of strong electrolytes at infinite dilutionBell, James Edgar. January 1914 (has links)
Thesis (Ph. D.)--University of Illinois, 1913. / Vita. Part II published in Journal of the American Chemical Society, v. 35, p. 177-184.
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An improved method for determining the equivalent conductances of strong electrolytes at infinite dilutionBell, James Edgar. January 1914 (has links)
Thesis (Ph. D.)--University of Illinois, 1913. / Vita. Part II published in Journal of the American Chemical Society, v. 35, p. 177-184.
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Theoretical and experimental investigations of moving boundary systems formed by weak electrolytesDismukes, Edward B. January 1953 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1953. / Typescript. Vita. Includes (as Part III): A study of refractive index increments of weak acids and buffer mixtures / By Edward B. Dismukes and Robert A. Alberty. Reprinted from Journal of the American Chemical Society, vol. 75 (1953), p. 809-814. Includes bibliographical references (leaves 110-111).
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