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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/10732

Title: Polarized Emission of Wholly Aromatic Bio-Based Copolyesters of a Liquid Crystalline Nature
Authors: Kan, Kai
Kaneko, Daisaku
Kaneko, Tatsuo
Keywords: copolymerization
liquid crystals
polarized light emission
fluorescence
Issue Date: 2011-05-16
Publisher: MDPI Publishing
Magazine name: Polymers
Volume: 3
Number: 2
Start page: 861
End page: 874
DOI: 10.3390/polym3020861
Abstract: 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
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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