Polarized Emission of Wholly Aromatic Bio-Based Copolyesters of a Liquid Crystalline Nature

• Kan, Kai

• Kaneko, Daisaku

• Kaneko, Tatsuo

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.

identifier:https://dspace.jaist.ac.jp/dspace/handle/10119/10732

収録刊行物

• Polymers

  Polymers 3 (2), 861-874, 2011-05-16

  MDPI Publishing

キーワード

• copolymerization
• liquid crystals
• polarized light emission
• fluorescence

詳細情報

• CRID: 1050845762468489600
• NII論文ID: 120004702560
• ISSN: 20734360
• Web Site: http://hdl.handle.net/10119/10732
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles