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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/10732
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| タイトル: | Polarized Emission of Wholly Aromatic Bio-Based Copolyesters of a Liquid Crystalline Nature |
| 著者: | Kan, Kai
Kaneko, Daisaku
Kaneko, Tatsuo |
| キーワード: | copolymerization
liquid crystals
polarized light emission
fluorescence |
| 発行日: | 2011-05-16 |
| 出版者: | MDPI Publishing |
| 誌名: | Polymers |
| 巻: | 3 |
| 号: | 2 |
| 開始ページ: | 861 |
| 終了ページ: | 874 |
| DOI: | 10.3390/polym3020861 |
| 抄録: | A novel thermotropic liquid crystalline polymers poly{3-benzylidene amino-4-hydroxybenzoic acid (3,4-BAHBA)-co-trans-4-hydroxycinnamic acid (4HCA: trans-coumaric acid)} (Poly(3,4-BAHBA-co-4HCA)), was synthesized by the thermal polycondensation of 4HCA and 3,4-BAHBA, which was synthesized by a reaction of 3-amino-4-hydroxybenzoic acid (3,4-AHBA) with benzaldehyde. When the 4HCA compositions of Poly(3,4-BAHBA-co-4HCA)s were above 55 mol%, the copolymers showed a nematic, liquid crystalline phase. Differential scanning calorimetry (DSC) measurements of the copolymers showed a high glass transition temperature of more than 100 °C, sufficient for use in engineering plastics. Furthermore, the copolymers showed photoluminescence in an N-methylpyrrolidone (NMP) solution under ultraviolet (UV) light with a wavelength of 365 nm. Oriented film of Poly(3,4-BAHBA-co-4HCA) with a 4HCA composition of 75 mol% emitted polarized light, which was confirmed by fluorescent spectroscopy equipped with parallel and crossed polarizers. |
| Rights: | © 2011 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
| URI: | http://hdl.handle.net/10119/10732 |
| 資料タイプ: | publisher |
| 出現コレクション: | c10-1. 雑誌掲載論文 (Journal Articles)
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