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1988 Fiscal Year Final Research Report Summary

Estimation of Life-time of Wood-based Materials according to the Physical Properties of Adhesives

Research Project

Project/Area Number 62470127
Research Category

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

Allocation TypeSingle-year Grants
Research Field 林産学
Research InstitutionThe University of Tokyo

Principal Investigator

MIZUMACHI Hiroshi  Faculty of Agriculture, The University of Tokyo, 農学部, 教授 (40022165)

Co-Investigator(Kenkyū-buntansha) KAJIYAMA Mikio  Faculty of Agriculture, The University of Tokyo, 農学部, 助手 (40191978)
TAKEMURA Akio  Faculty of Agriculture, The University of Tokyo, 農学部, 助手 (50183455)
HATANO Yasunori  Faculty of Agriculture, The University of Tokyo, 農学部, 助手 (70172921)
Project Period (FY) 1987 – 1988
Keywordswood adhesion / adhesives / dynamic mechanical properties / durability / adhesive strength / creep / マスターカーブ
Research Abstract

A variety of new wood-based materials have recently been industrially developed and they are going to be used in some structural applications, where mechanical durability of the materials is considered to be one of the most important factor. We have tried to compare the physical properties of adhesives and adhesive performances, including the durability of the bonded systems, and to analyse the results rheologically. Results are summarized below;
Dynamic mechanical properties of 3 PVAc-based adhesives, a polyester hot melt adhesive, 3 EVAc-based hot melt adhesives and an acrylic foam binder (VHB) are measured at 110Hz. Adhesive shear strength, adhesive tensile strength and peel strength are measured as a function of both temperature and deformation rate. Time-temperature superposition procedures are applied to the experimental data, and master curves are constructed. Adhesive shear strength has a maximum at the highest deformation rate, and the magnitude is high. Adhesive tensile strength has a maximum at slightly lower rate than adhesive shear strength has, and has a lower magnitude. Peel strength has a maximum at the lowest deformation rate. These peaks shift toward higher rate side as the relaxation time is lowered, or vice versa.
Our next step is to measure the creep life-time of bonded systems as a function of both temperature and load level, and it is found that the life-time of the bonded materials can be described in a rheological manner. As these kinds of data are accumulated more in future, the theory to predict the life-time of the bonded materials must be refined to a greater extent.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] K.Motohashi;B.Tomita;H.Mizumachi;S.Sakaguchi: Wood and Fiber Sci.16. 72-85 (1984)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Takemura;B.Tomita;H.Mizumachi: J.Appl.Polymer Sci.30. 4031-4043 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Takemura;B.Tomita;H.Mizumachi: J.Appl.Polymer Sci.31. 1351-1362 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Takemura;B.Tomita;H.Mizumachi: J.Appl.Polymer Sci.32. 3489-3498 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Hatano;B.Tomita;H.Mizumachi: Holzforschung. 40. 255-258 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Mizumachi;Y.Hatano: J.Adhesion. 21. 251-260 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山口章三郎: "接着・粘着の事典"I.4.接着・粘着のレオロジー"" 朝倉書店, 38-56 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 池上皓三,遠藤剛,永田宏二,水町浩 編: "新しい接着剤の開発と応用"接着の科学"" シーエムシー, 1-11 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Motohashi; B. Tomita; H. Mizumachi; S. Sakaguchi: "Temperature Dependency of Bond Strength of Polyvinyl Acetate Emulsion Adhesives for Wood" Wood and Fiber Sci.16. 72-85 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Takemura; B. Tomita; H. Mizumachi: "Dynamic Mechanical Properties and Adhesive Strengths of Epoxy Resins Modified with Liquid Rubber. I. Modification with ATBN" J. Appl. Polymer Sci.30. 4031-4043 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Takemura; B. Tomita; H. Mizumachi: "Dynamic Mechanical Properties and Adhesive Strengths of Epoxy Resins Modified with Liquid Rubber. II. Modification with CTBN" J. Appl. Polymer Sci.31. 1351-1362 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] A. Takemura; B. Tomita; H. Mizumachi: "Synthesis of IPN-Related Materials from Solution of Polyacrylates" J. Appl. Polymer Sci.32. 3489-3498 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Hatano; B. Tomita; H. Mizumachi: "Relation between Viscoelastic Properties of Polyvinyl Acetate and Adhesive Strength" Holzforschung. 40. 255-258 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Mizumachi: "Science of Adhesion" in [Developments and Applications of New Adhesives],. CMC, 1-11 (1987)

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

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Published: 1990-03-20  

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