Wood Adhesive Bondlines by Nanoindentation

  • Johannes Konnerth
  • Andreas Jäger
  • Josef Eberhardsteiner
  • Ulrich Müller
  • Wolfgang Gindl
Conference paper

Abstract

The mechanical properties of both the adhesive and interphase cell walls in wood adhesive bonds were determined by nanoindentation. Seven different polymers used frequently as adhesives and/ or matrix polymers in wood, wood composites, and natural fibre reinforced composites were studied by nanoindentation (Konnerth et. al [1]) and compared with results from previous uniaxial tensile tests (Konnerth et. al [2]). It was shown that the elastic modulus, the hardness, the creep factor, and the elastic-, plastic-, and viscoelastic work of indentation of the seven different polymers is essentially the same regardless whether the polymers were tested in the form of pure films or in-situ, i.e. in an adhesive bond line with spruce wood. An excellent correlation was found between the elastic modulus measured by tensile tests and the elastic modulus measured by nanoindentation. In spite of the good correlation, the elastic modulus measured by nanoindentation is significantly higher than the elastic modulus measured by tensile tests.

Keywords

Formaldehyde Polyurethane PVAc 

References

  1. 1.
    Konnerth, J., Jäger, A., Eberhardsteiner, J., Müller, U., Gindl, W., Journal of Applied Polymer Science, Elastic properties of adhesive polymers, II. Polymer films and bond lines by means of Nanoindentation vol. 102(2), 1234–1239, 2006CrossRefGoogle Scholar
  2. 2.
    Konnerth, J., Gindl, W., Müller, U. Journal of Applied Polymer Science, Elastic properties of adhesive polymers, Part I: polymer films by means of electronic speckle pattern interferometry, in print, 2006Google Scholar
  3. 3.
    Konnerth, J., and Gindl, W., Holzforschung, Mechanical characterisation of wood-adhesive interphase cell walls by nanoindentation, vol. 60, 429–433, 2006CrossRefGoogle Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Johannes Konnerth
    • 1
  • Andreas Jäger
    • 2
  • Josef Eberhardsteiner
    • 2
  • Ulrich Müller
    • 1
    • 3
  • Wolfgang Gindl
    • 1
  1. 1.Institute of Wood Science and Technology, Department of Material Sciences and Process EngineeringBOKU-University of Natural Resources and Applied Life SciencesViennaAustria
  2. 2.Institute for Mechanics of Materials and StructuresVienna University of TechnologyViennaAustria
  3. 3.Wood Kplus - Competence Center for Wood Composites and Wood ChemistryLinzAustria

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