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1999 Fiscal Year Final Research Report Summary

Polymer Science in Quasi-Two-Dimensional Systems-Analysis of Internal Structures of Polymer Ultra-thin Films with Molecular Dimensions

Research Project

Project/Area Number 09450360
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 高分子構造・物性(含繊維)
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

ITO Shinzaburo  Kyoto Univ., Engineering, Professor, 工学研究科, 教授 (50127049)

Co-Investigator(Kenkyū-buntansha) OHOKA Masataka  Kyoto Univ., Engineering, Tech. Instructor, 工学研究科, 教務技官 (10160425)
Project Period (FY) 1997 – 1999
KeywordsUltra-thin Films / Polymer / Two-dimensions / Fluorescence Probe / Spectroscopy / Surface / Molecular Morphology / Molecular Motion
Research Abstract

Polymer thin films has attracted much attention as a basic material for fabricating nanometric structures of organic assemblies. This research project has been performed in order to reveal fundamental properties of two-dimensional polymer systems such as polymer monolayer and ultra-thin polymer films from a view of polymer science. The issues focused in this project were listed as follows.
1) Chain expansion of a single polymer in two-dimensional monolayer systems By using the energy transfer method, the root square mean distance of a single polymer chain was successfully evaluated in a monolayer system. From the comparison of the experimental value of energy transfer efficiency and the simulated value for two-dimensional chains, it was revealed that the polymer chains took contracted forms in the monolayer in order to minimize free area without chain entanglement at the surface.
2) Chain conformation and entanglement in two-dimensional systems Molecular weight dependence of the shear viscosity for the air/water interfacial monolayers was investigated to elucidate chain morphology in the two-dimensional plane. The viscosity was proportional to the unit power of the molecular weight, indicating that there exists little entanglement of the polymer chains and each chain is segregated in the two-dimensional system.
3) Structural relaxation mechanism and dynamics in monolayers
The microscopic motion of polymer chain in a monolayer was examined by time-resolved fluorescence depolarization method, and the rotational relaxation times were evaluated in a nanosecond scale. The dynamic behavior of polymer segment in the monolayer was revealed for the first time and indicated that the mobility is predominantly governed by the cohesive force of hydrophobic chains.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] N.Sato: "Energy Migration and Excimer Formation in Quasi-Two-Dimensional Polymer Films"J.Phys.Chem.,A. 103. 3402-3409 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Sato: "Energy Transfer Study of Polymer Chain Morphology in a Two-Dimensional Monolayer"Polymer J.. 31. 488-493 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Sakurai: "Phase Separation Morphology of a Mixed Polymer Monolayer"高分子論文集. 56. 850-854 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊藤 紳三郎: "光でみる高分子ナノ超薄膜の姿"日本化学繊維研究所講演集. 54. 33-43 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊藤 紳三郎: "高分子薄膜表面の動的・静的構造解析"高分子. 48. 702-705 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 伊藤 紳三郎: "季刊総説No,42. 無機有機ナノ複合物質"学会出版センター. 9 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuhiro Sato, Shinzaburo Ito, and Masahide Yamamoto: "Molecular Weight Dependence of Shear Viscosity of a Polymer Monolayer : Evidence for the Lack of Chain Entanglement in the Two-Dimensional Plane"Macromolecules. 31. 2673-2675 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Michiaki Mabuchi, Kenji Kawano, Shinzaburo Ito, and Masahide Yamamoto: "Structural Relaxation of Langmuri-Blodgett Films of Poly(vinyl octanal acetal) with Various Tacticities"Macromolecules. 31. 6077-6082 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Michiaki Mabuchi, Kenji Kawano, Shinzaburo Ito, Masahide Yamamoto, Masaoki Takahashi, and Toshiro Masuda: "Structural Relaxation of Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique : Characteristics of the Two-Dimensional System"Macromolecules. 31. 6083-6088 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Michiaki Mabuchi, Shinzaburo Ito, Masahide Yamamoto, Takeaki Miyamoto, Albert Schmidt, and Wolfgang Knoll: "Nanostructure and Thermal Stability of the Poly-glutamate Langmuir-Blodgett Films Probed by Interlayer Energy Transfer Method"Macromolecules. 31. 8802-8808 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobuhiro Sato, Shinzaburo Ito, Kazutoshi Sugiura, and Masahide Yamamoto: "Energy Migration and Excimer Formation in Quasi-Two-Dimensional Polymer Films As Revealed by the Time-Resolved Fluorescence Depolarization Measurement"J.Phys.Chem.A. 103. 3402-3409 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobuhiro Sato, Yousuke Osawa, Shinzaburo Ito, and Masahide Yamamoto: "Energy Transfer Study of Polymer Chain Morphology in a Two-Dimensional Monolayer"Polym.J.. 31. 488-493 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yuji Sakurai, Nobuhiro Sato, Shinzaburo Ito, and Masahide Yamamoto: "Phase Separation Morphology of a Mixed Polymer Monolayer"Kobunshi Ronbunsyu. 56. 850-854 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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