Investigation of Molecular Chain Orientation Change of Polymer Crystals in Phase Transitions by Friction Anisotropy Measurement

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• 作者：Kuniko Kimura ; Kei Kobayashi ; Hirofumi Yamada ; Kazumi Matsushige
• 刊名：Langmuir
• 出版年：2007
• 出版时间：April 24, 2007
• 年：2007
• 卷：23
• 期：9
• 页码：4740 - 4745
• 全文大小：476K
• 年卷期：v.23,no.9(April 24, 2007)
• ISSN：1520-5827

文摘

Direct observation of the molecular orientation change in polymer crystals provides us visible information forunderstanding their structural phase-transition mechanisms. In this letter, we successfully identified the main-chainorientation of poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE)) crystals over all directions using frictionanisotropy measured by lateral-modulation friction force microscopy (LM-FFM). This technique made possible ourinvestigation of molecular orientation changes caused by a ferroelectric phase transition and also a fabrication processfor artificial nanometer-scale structures. These results give us visual information that is directly connected to thetransition mechanisms.