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Gewählte Publikation:

Gindl, W., Hansmann, C., Gierlinger, N., Schwanninger, M., Hinterstoisser, B., Jeronimidis, G..
(2004): Using a water soluble melamine-formaldehyde resin to improve the hardness of Norway spruce wood
Journal of Applied Polymer Science, 93, 1900-1907 FullText FullText_BOKU

Abstract:
Samples of Norway spruce wood were impregnated with a water-soluble melamine formaldehyde resin by using short-term vacuum treatment and long-term immersion, respectively. By means of Fourier transform infrared (FTIR) spectroscopy and UV microspectrophotometry, it was shown that only diffusion during long-term immersion leads to sufficient penetration of melamine resin into the wood structure, the flow of liquids in Norway spruce wood during vacuum treatment being greatly hindered by aspirated pits. After an immersion in aqueous melamine resin solution for 3 days, the resin had penetrated to a depth > 4 mm, which, after polymerization of the resin, resulted in an improvement of hardness comparable to the hardwood beech. A finite element model describing the effect of increasing depth of modification on hardness demonstrated that under the test conditions chosen for this study, a minimum impregnation depth of 2 mm is necessary to achieve an optimum increase in hardness. (C) 2004 Wiley Periodicals, Inc.
Autor/innen der BOKU Wien:
Gierlinger Notburga
Gindl-Altmutter Wolfgang
Hansmann Christian
Hinterstoisser Barbara
Schwanninger Manfred
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Find related publications in this database (Keywords)
hardness
diffusion
mechanical properties
melamine-formaldehyde
wood


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