Kinetics of the Ferroelectric-Paraelectric Transition of Copolymers of Vinylidene Fluoride with Trifluoroethylene Studied by Time Evolution of Dielectric Permittivity
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概要
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The time evolution of the dielectric permittivity was measured for copolymers of vinylidene fluoride (VDF) with trifluoroethylene (TrFE) during the ferroelectric-paraelectric transition induced by a temperature jump. The results were analyzed on the basis of a nucleation-growth model. The characteristic time constant associated with transition kinetics was shown to depend on the degree of supercooling or superheating. The evaluated equilibrium transition temperature was located between the apparent transition temperatures during heating and cooling at a constant rate. The surface free energy between the two phases considerably decreased with increasing TrFE content in accordance with a change in transition type from the first order to second-order-like.
- 社団法人応用物理学会の論文
- 2000-06-15
著者
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Furukawa Takeo
Department Of Chemistry Faculty Of Science Science University Of Tokyo
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Takahashi Yoshiyuki
Department Of Anesthesiology Dokkyo Medical University
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Takahashi Yoshiyuki
Department Of Chemistry Faculty Of Science Science University Of Tokyo
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