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Structural Fluctuations and Crystal Growth in Ultra-thin Polymer Films

Research Project

Project/Area Number 06452069
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 物理学一般
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

MIYAJI Hideki  Kyoto Univ., Fac.of Sci., Assoc.Prof., 大学院・理学研究科, 助教授 (90025388)

Co-Investigator(Kenkyū-buntansha) TODA Akihiko  Hiroshima Univ., Int.Arts & Sci., Assoc.Prof., 総合科学部, 助教授 (70201655)
IZUMI Kunihide  Kyoto Univ., Fac.of Sci., Instructor, 大学院・理学研究科, 助手 (50025376)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥6,500,000 (Direct Cost: ¥6,500,000)
KeywordsPolymer / Ultra-thin Film / Crystal Growth / Structural fluctuation / Diffusion
Research Abstract

1.Ultra-thin polystirene films from 20 to several hundreds of nm in thickeness were prepared by a water casting method. Since the radius of gyration is given to be 0.03*M^<1/2> nm for a poly-stirene chain with molecular weight of M,the chains with molecular weight of more than 100,000 are to be squeezed in the ultra-thin films ; accordingly chains shows structures and dynamics different from those in bulk. 2.The X-ray amorphous halo observed with use of PSPC has shown no difference between the thin film and bulk ; the structure of the most of chains in the film has the same structure as in bulk. 3.Atomic force microscopy shows that the fluctuation of height on the surface of the amorphous film is about 1 nm. The fluctuation was observed also on the crystal surface after crystallization of the film, and hence crystais are coverd with amorphous layr. 4.The effect of substrate are conspicuous on primary nucleations. Above 210゚C of crystallization temperature, lemellar crystals perpendicular to a carbon substrate were observed at the center of grown crystals ; a screw dislocation was at the center for mica substrate. Below 150゚C,observed were 2-dimensional spherulites with branched lemellae perpendicular to the substrate. 5.Film thckness dependence of lateral growth rates wrere measured as a function of molecular weight M,crystallization temperature T_C and substrate materials. For the lamellar crystals parallel to the substrate, the growth rate G decease linearly with the inverse of the thickness D : G/G_*=1-a/D where G_* is the growth rate in bulk, a is a constant of about 5 nm, independent of T_C, M and substrate materials. For the 2-D spherulites, G remains unchanged with decreasing D.We therefore conclude that the part of a polymer chain at a distance less than 5 nm from a substrate "feels" the absorption of chain segments on the substrate, and hence suffers the delay of diffusion for crystallization to give rise to G decreasing linearly with 1/D.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 泉 邦英: "Atomic Foce Microscopy of Isotactic Polystyrene Crystals." Jpn. J. Appl. Phys.33. L1628-L1630 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 宮本 嘉久: "Small-angle X-ray Scattering of Isotactic Polystyrene." Colloid. Polym. Sci.273. 66-75 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 奥村 茂行: "Melting Point Maximum against Pressure in Poly-4-Methyl-Pentene-1 Crystals." Polymer. 37(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 松本 太成: "Dielectric Properties and Phase Transitions in Polydiacetylene-bis(p-Toluene Sulphonate)." J. Phys. Soc. Jpn.65(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 泉 邦英: "Growth and Lattice Defects of Hexamethyl benzene Crystals." J. Cryst. Growth. (印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Izumi, Kunihide: "Atomic force microscopy of isotactic polystirene crystals." Jpn.J.Appl.Phys.33. L1628-L1630 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Miyamoto, Yoshihisa: "Small angle x-ray scattering of isotactic polystirene." Colloid.Polym.Sci.273. 66-75 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Okumura, Shigeyuki: "Melting point maximum against pressure in poly-4methyl-pentene-1 crystals." Polymer. 37 (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsumoto, Taisei: "Dielectric properties and phase transitions in polydiacetylene-bis (p-toluene sulphonate)." J.Phys.Soc.Jpn.65 (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Izumi, Kunihide: "Growth and lattice defects of hexamethylene crystals." J.Cryst.Growth. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 宮本嘉久: "Small-angle X-ray Scattering ofIsotactic Polystyrene." Colloid. Polym. Sci.273. 66-75 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 奥村茂行: "Melting Point Maximum against Pressure in Poly-4-Methyl-Pentene-1 Crvstals." Polymer. 37(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 松本太成: "Dielectric Properties and Phase Transitions of Polvdiacetylene-bis(p-Toluene Sulphonate)." J. Phys. Soc. Jpn.65(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 泉 邦英: "Growth and Lattice Defects of Hexamethylbenzene Crystals." J. Cryst. Growth. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 泉.邦英: "薄膜における高分子結晶の成長" 日本結晶成長学会誌. 21. S265-S272 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 中川善嗣: "Atomic Force Microscopy of Solution Grown Polyethylene Single crystals." Jpn.J.Appl.Phys.33. 3771-3774 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 泉.邦英: "Atomic Force Microsocpy of Isotactic Polystyrene Crystals." Jpn.J.Appl.Phys.33. L1628-L1630 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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