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Rheo-Optical Studies on High Performance Elastomers for Medical Use.

Research Project

Project/Area Number 01460229
Research Category

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

Allocation TypeSingle-year Grants
Research Field 高分子物性
Research InstitutionKyoto Institute of Technology

Principal Investigator

NOMURA Shunji  Kyoto Inst. of Tech., Dept. of Polymer Sci. & Eng., Professor, 繊維学部, 教授 (10026073)

Co-Investigator(Kenkyū-buntansha) SHIBAYAMA Mitsuhiro  Kyoto Inst. of Tech., Dept. of Polymer Sci. & Eng., Associate Professor, 繊維学部, 助教授 (00175390)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1991: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1990: ¥300,000 (Direct Cost: ¥300,000)
KeywordsElastomers for Medical Use / Dynamic Infrared Dichroism / Segmented Poly(urethane)s / FTIR / Mechanical Fatigue / フ-リエ変換赤外分光法
Research Abstract

It was the purpose of this research to clarify change of microphase separated structure in elastomers due to mechanical fatigue and to develop high performance elastomers for medical use.
1. Static and dynamic infrared absorption dichroism measurements were performed in order to study the deformation mechanism of segmented poly (urethaneurea) s (SPUU), having different soft segment molecular weights, over a wide range of temperatures and frequency, and the following facts were disclosed :
(1) The capability of orientation for the soft segments decreases at high temperature or low frequency. This is due to increase in the effective length of the soft segments by lowering the number of effective cross-links in the soft segment matrix at high temperature or low frequency.
(2) The capability of the negative orientation of the hard segments in SPUU having high soft segment molecular weight decreases with increasing temperature but that of low molecular weight does not depend either temperature or frequency. This can be explained based on differences in cohesive force in hard segment domains.
2. The mechanical and orientation behavior of segmented polyurethan (SPU) with a polydinethylsiloxane component (PES) in the main chain was investigated, and the following facts were disclosed :
(1) Both hard and soft segments are oriented positively from the beginning of stretching, which is completely different from SPUU. This can be explained by low cohesive power of the hard segments.
(2) Systematic variations in the mechanical and thermal properties were found with the soft segment molecular weight. The higher the molecular weight, the higher the degree of completion in microphase separation.
(3) The PES component in the soft segment reduces the capability of crystallization of PTMG but raises the degree of completion in microphase separation between the soft and hard segments.

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 柴山 充弘: "Strucutre and Orientation Behaviors of Polyurethane Containing Polydimethylsiloxane" Polymer(London). 31. 749-757 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 河野 茂雄: "Change in MicroーStructure of Segmented Poly(urethaneurea) in Water due to Mechanical Fatigue" Rept.Prog.Polym.Phys.,Japan. 33. 319-322 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 山本 友之: "Structure and Properties of Fatigued Segmented Poly(urethaneurea)s IV.Dynamic Infrared Dichroism" Polymer J.,Japan. 23. 311-320 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 柴山 充弘: "Structure Characterization of Polyurethanes Containing Poly(dimethyl Siloxane)" Macromolecules. 24. 6254-6262 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Mitsuhiro Shibayama, Minoru Ineue, Tomoyuki Yamamoto, and Shunji Nomura: ""Structure and Orientational Behavior of Polyurethane Containing Polydimethylsiloxane"" Polymer. 31. 749-757 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Shigeo Kawano, Mitsuhiro Shibayama, and Shunji Nomura: ""Changes in Micro-Structure of Segmented Poly(urethaneurea) in Water due to Mechanical Fatigue"" Rept. Prog. Polym. Phys., Japan. 33. 319-322 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tomoyuki Yamamoto, Mitsuhiro Shibayama, and Shinji Nomura: ""Structure and Properties of Fatigued Segmented Poly(urethaneurea)s IV. Dynamic Infrared Dichroism"" Polymer J.23. 311-320 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Mitsuhiro Shibayama, Masakatu Suetsugu, Shinichi Sakurai, Tomoyuki Yamamoto, and Shunji Nomura: ""Structure Characterization of Polyurethanes Containing Poly(dimethyl Siloxane)"" Macromolecules. 24. 6254-6262 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 山本 友之: "Structure and Properties of Fatigued Segmented Poly(urethaneurea)s IV.Dynamic Infrared Dichroism" Polymer J.,Japan. 23. 311-320 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 柴山 充弘: "Structure Characterization of Polyurethanes Containing Poly(dimethyl Siloxane)" Macromolecules. 24. 6254-6262 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 柴山 充弘: "Strucutre and Orientation Behaviors of Polyurethane Containing Polydimethylsiloxane" Polymer(London). 31. 749-757 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 河野 茂雄: "Change in MicroーStructure of Segmented Poly(urethaneurea) in Water due to Mechanical Fatigue" Rept.Prog.Polym.Phys.,Japan. 33. 319-322 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 山本 友之: "Structure and Properties of Fatigued Segmented Poly(urethaneurea)s IV.Dynamic Infrared Dichroism" Polymer J.,Japan,. 23. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 柴山 充弘: "Structure Characterization of Polyurethanes Containing Poly(dimethy Siloxane)" Macromolecules,.

    • Related Report
      1990 Annual Research Report
  • [Publications] 河野茂雄: "Change in Micro-Structure of Segmented Poly(urethaneurea)in Water due to Mechanical Fatigue." Rept.Prog.Polym.Phys.,Japan.

    • Related Report
      1989 Annual Research Report
  • [Publications] 野村春治: "Apparatus for Dynamic Infrared Dichroism under Sinusoidal Strain." Polymer J.

    • Related Report
      1989 Annual Research Report
  • [Publications] 山本友之: "Structure and Properties of Fatigued Segmented Poly(urethaneurea)s.IV.Dynamic Infrared Dichorism." Polymer J.

    • Related Report
      1989 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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