Dependence of orientational order of liquid crystalline molecules at (polymer/liquid crystal) interface on polymer surface

Sung Kyu Hong, Noriko Iwata, Hirotsugu Kikuchi, Tisato Kajiyama

Research output: Contribution to journalArticle

Abstract

Relative magnitude of the orientational order of liquid crystal (LC) molecules at the (polymer/LC) interface against that in the bulk phase was evaluated by two different methods. One was an indirect method based on the statistic phenomenological theory by measuring the difference between the nematic-isotropic phase transition temperatures ( TNI) at the interface and that in the bulk phase. The other was a rather direct method based on the optical second-harmonic generation (SHG) technique that could evaluate the orientational order of the LC molecules contacting with the substrate surface. Qualitative agreement was obtained for the results of interfacial order of the LC molecules from these two methods. The orientational order of LC molecules at the (polymer/LC) interface was strongly dependent upon the difference of interfacial energy between the polymer and LC molecules.

Original languageEnglish
Number of pages1
JournalNippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal
Issue number3
Publication statusPublished - Dec 1 1999

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Liquid crystal polymers
Liquid Crystals
Liquid crystals
Polymers
Crystalline materials
Molecules
Liquids
Harmonic generation
Interfacial energy
Superconducting transition temperature
Phase transitions
liquid crystal polymer
Statistics
Substrates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "Relative magnitude of the orientational order of liquid crystal (LC) molecules at the (polymer/LC) interface against that in the bulk phase was evaluated by two different methods. One was an indirect method based on the statistic phenomenological theory by measuring the difference between the nematic-isotropic phase transition temperatures ( TNI) at the interface and that in the bulk phase. The other was a rather direct method based on the optical second-harmonic generation (SHG) technique that could evaluate the orientational order of the LC molecules contacting with the substrate surface. Qualitative agreement was obtained for the results of interfacial order of the LC molecules from these two methods. The orientational order of LC molecules at the (polymer/LC) interface was strongly dependent upon the difference of interfacial energy between the polymer and LC molecules.",
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T1 - Dependence of orientational order of liquid crystalline molecules at (polymer/liquid crystal) interface on polymer surface

AU - Hong, Sung Kyu

AU - Iwata, Noriko

AU - Kikuchi, Hirotsugu

AU - Kajiyama, Tisato

PY - 1999/12/1

Y1 - 1999/12/1

N2 - Relative magnitude of the orientational order of liquid crystal (LC) molecules at the (polymer/LC) interface against that in the bulk phase was evaluated by two different methods. One was an indirect method based on the statistic phenomenological theory by measuring the difference between the nematic-isotropic phase transition temperatures ( TNI) at the interface and that in the bulk phase. The other was a rather direct method based on the optical second-harmonic generation (SHG) technique that could evaluate the orientational order of the LC molecules contacting with the substrate surface. Qualitative agreement was obtained for the results of interfacial order of the LC molecules from these two methods. The orientational order of LC molecules at the (polymer/LC) interface was strongly dependent upon the difference of interfacial energy between the polymer and LC molecules.

AB - Relative magnitude of the orientational order of liquid crystal (LC) molecules at the (polymer/LC) interface against that in the bulk phase was evaluated by two different methods. One was an indirect method based on the statistic phenomenological theory by measuring the difference between the nematic-isotropic phase transition temperatures ( TNI) at the interface and that in the bulk phase. The other was a rather direct method based on the optical second-harmonic generation (SHG) technique that could evaluate the orientational order of the LC molecules contacting with the substrate surface. Qualitative agreement was obtained for the results of interfacial order of the LC molecules from these two methods. The orientational order of LC molecules at the (polymer/LC) interface was strongly dependent upon the difference of interfacial energy between the polymer and LC molecules.

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