Growth of Single Crystals of Poly(vinylidene fluoride) under High Pressures
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概要
- 論文の詳細を見る
Lamellar crystals of poly(vinylidene fluoride) about 0.2 μm thick and 10 μm wide are grown in films crystallized at high pressures and high temperatures. Electron diffraction shows that the lamellar crystal is a β-form single crystal composed of all-trans extended chains. DSC and crystallization studies suggest that the β-form crystals are grown in the paraelectric or hexagonal phase which appears above 2.0 kb and 260℃ in the heating process and above 2.0 kb and 210℃ in the solidification process. The phase diagram of PVDF is proposed. The β-form film has distinctive ferroelectricity and strong piezoelectricity: P_r = l00 mC/m^2 and E_c = 75 MV/m, and k_t = 0.2.
- 社団法人応用物理学会の論文
- 1989-09-20
著者
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Hattori Takeshi
Department Of Polymer Materials Engineering Faculty Of Engineering Yamagata University
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Hattori Takeshi
Department Of Applied Physics Faculty Of Science Science University Of Tokyo:(present)the Institute
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Ohigashi Hiroji
Department Of Materials Science And Engineering Faculty Of Engineering Yamagata University
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Ohigashi Hiroji
Department of Material Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan
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