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Free Volumes of Ploymers Studied by Positron Annihilation

Research Project

Project/Area Number 06651064
Research Category

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

Allocation TypeSingle-year Grants
Research Field 高分子構造・物性(含繊維)
Research InstitutionNATIONAL LABORATORY FOR HIGH ENERGY PHYSICS

Principal Investigator

SUZUKI Takenori  NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS RADIATION SAFETY CONTROL CENTER,ASSOCIATE PROFESSOR, 放射線安全管理センター, 助教授 (40162961)

Co-Investigator(Kenkyū-buntansha) UMAJIRI Masaharu  NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS RADIATION SAFETY CONTROL CENTER,RESE, 放射線安全管理センター, 助手 (20189385)
OKI Yuichi  NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS RADIATION SAFETY CONTROL CENTER,RESE, 放射線安全管理センター, 助手 (40204094)
MIURA Taichi  NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS RADIATION SAFETY CONTROL CENTER,RESE, 放射線安全管理センター, 助手 (80209717)
KONODO Kenjiro  NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS RADIATION SAFETY CONTROL CENTER,PROF, 放射線安全管理センター, 教授 (20004434)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1995: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsPOSITRON ANNIHILATION / POSITONIUM / POLYMER / POLYMERIZATION / POLYETHYLRNE / EPOXY RESINS / FREE VOLUME HOLES / INTEGRATED CIRCUITS / ガンマ線照射効果 / 陽電子照射効果 / ポリプロピレン
Research Abstract

A positron-annihilation lifetime (PAL) technique was applied to four kinds of epoxy resin (cresol novolac (CR), tris-hydroxy-phenyl-methane (THPM), tetra-methyl-biphenol (TMB) and bis-phenol A (BA)) in order to study the relation between the intermolecular space holes and water absorption. The size of the holes was measured based on the lifetime (tau_3) of the ortho-positronium (o-Ps). Since THPM has a larger tau_3 value (hence, a larger intermo-lecular-space hole) and absorption rate than that of the other samples, the correlation between tau_3 and the absorption rate has been shown to be evident.
Assuming a very simplified model, the shapes of the holes for the smallest unit cell were calculated using a computer code of molecular-dynamics ; the shape for THPM was found to be different from those of the other three samples.
A polymerization process of Bisphenol-A dicyanate (BADCy) has been studied by a positron annihilation lifetime (PAL) technique. In the process, BADCy was cured through triazine ring formation by heating ; the state changed from a powder at room temperature, through a liquid above the melting point, to a solid after curing at high temperatures. It has been shown that PAL is a powerful technique for studying microscopic structure changes and the state transition of the continuous polymerization process.

Report

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

    (23 results)

All Other

All Publications (23 results)

  • [Publications] 鈴木健訓,他: "Radiation effect on polypropylene studied by relaxatimal behavior at low temperature using positron annihilation" Polymer. (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓,他: "Free volume characteristics and water absorption of novolac epoxy resins investigated by positron annihilation" Polymer. (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓,他: "Structure dependence of γ-ray irradiation effects on polyethylenes studied by positron annihilation" Radiation Physics and Chemistry. 45. 797-804 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓,他: "Positron irradiation effectson polyprogylene and polyethylene studied by positron annihilation" Radiation Physics and Chemistry. 45. 657-663 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓,他: "Polymerization of bisphenol-A dicyanate studied by positron annihilation" Material Science Forum. 175-178. 785-788 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓,他: "Effects of Aging and Oxidation on positronium formation in polyethylenes" Radiation Physics and Chemistry. 43. 557-562 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.SUZUKI,et al.: "Radiation effect on polypropylene studied by relaxational behavior at low temperature using positron annihilation" Polymer. (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] T.SUZUKI,et al.: "Free-volume characteristics and water absorption of novolac epoxy resins investigated by positron annihilation" Polymer. (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] T.SUZUKI,et al.: "Polymerization of bisphenol-A dicyanate studied by positron annihilation" Material Science Forum.Vols.175-178. 785-788 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.SUZUKI,et al.: "Structure dependence of gamma-ray irradiation effects on polyethylenes studied by positron annihilation" Radiation Physics and Chemistry. Vol.45. 797-804 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.SUZUKI,et al.: "Positron irradiation effects on polypropylene and polyethylene studied by positron annihilation" Radiation Physics and Chemistry. Vol.45. 657-663 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.SUZUKI,et al.: "Effects of Aging and Oxidation on Positronium Formation in Polyethylenes" Radiation Physics and Chemistry. Vol.43. 557-562 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木健訓、他: "Radiation eftect on polypropylene studied by relaxational behavior at lon tenperatare using positron annihilation" Polymer. (in Press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木健訓、他: "Free Volume Characteristics and water absorption of sovolac epoxy resins investigated by positron annihilation" Polymer. (in Press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木健訓、他: "Structure dependenvce of r-ray irradiation effects on polyethylenes stidied by positron annihilation" Radiation Physics and Chemistry. 45. 797-804 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木健訓、他: "Positron irradiation effects on polypropylene and polyethylene Studied by positron annihilation" Radiation Physics and Chemistry. 45. 657-663 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木健訓、他: "Polymerization of bisphenol-A dicyanate studied by positron annihilation" Material Science Forum. 175-178. 785-788 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 鈴木健訓、他: "Effects of aging and oxidation on positroriun Formation in Polyethylives" Radiation Physics and Chemistry. 43. 557-562 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Suzuki T.,Oki Y.,et al.: "Effects of Aging and Oxidation on Positronium Formation in Polyethylenes" Radiation Physics and Chemistry. 43. 557-562 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Suzuki T.,Oki Y.,et al.: "Characteristics of polyethylenes at low temperature studied by positron annihilation" Hyperfine Interactions. 84. 407-411 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Suzuki T.: "Polymerization of epoxy resins and characteristics of the molding compounds studied by positron annihilation" Journal of the Adhesion Society of Japan. 30. 372-376 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Suzuki T.,Miura T.,et al.: "Positron irradiation effects on polypropylene and polyethylene studied by positron annihilation" To be published in Radiation Physics and Chemistry. (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Suzuki T.,Miura T.,et al.: "Structure dependence of gamma-ray irradiation effects on polyethylenes studied by positron annihilation" To be published in Radiation Physics and Chemistry. (1995)

    • Related Report
      1994 Annual Research Report

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

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