Observation of transient phase separation process of liquid crystal/ polymer composites obtained by photo-polymerization induced-phase separation and their electro-optical properties

• Niiyama Satoshi

  Department of Applied Science for Engineering and Materials, Graduate student

• 菊池 裕嗣

  九州大学大学院総合理工学府

抄録

A transient phase separated structure during the photo-polymerization induced-phase separation process of liquid crystal/polymer composites consisting of a continuous phase of nematic liquid crystal and a three-dimensional polymer network was successfully observed by interrupting UV light irradiation for photo-polymerization. Those transient composites were characterized by a difference in temperature for nematic-isotropic transition point (Tn-i) of the liquid crystal phase, a comparison of morphology for polymer phase between an initial stage and the last stage of phase separation, and an electro-optical performance at each period of phase separation process. It was found that the composite even at an initial stage of phase separation showed a transparent-turbid (light scattering) operation with an electric field and the UV irradiation period required to attain the final voltage-transmittance curve accorded well with that to give a saturation of Tn-i of the liquid crystal phase. A schematic diagram for photo-polymerization induced-phase separation process was proposed according to investigation into characteristics of the liquid crystal/polymer composites having a transient phase separated structure.

収録刊行物

• 九州大学大学院総合理工学報告

  九州大学大学院総合理工学報告 34 (2), 1-7, 2013-02

  九州大学大学院総合理工学府

キーワード

• Liquid crystal/polymer composite
• Photo-polymerization induced-phase separation
• Transient phase structure
• Electro-optical property

詳細情報

• CRID: 1390853649768222336
• NII論文ID: 120005227066
• DOI: 10.15017/25911
• HANDLE: 2324/25911
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可