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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Mechanical properties of wood in an unstable state due to temperature changes, and analysis of the relevant mechanism III: effect of quenching on stress relaxation of chemically modified woods

Journal of Wood Science volume 53, pages 94–99 (2007)Cite this article

An Erratum to this article was published on 01 April 2007

Abstract

In order to understand the mechanism of destabilization occurring when wood is quenched, we applied chemical modifications, and controlled the number of moisture adsorption sites in wood. The degree of destabilization was evaluated according to the fluidity (1-E t/E 0), increase in fluidity, and relative fluidity in relation to the nonmodified wood, and was discussed by comparing these quantities with the hygroscopicity or swelling of wood. We found that destabilization of chemically modified wood was lower than that in nonmodified wood, and the amount of adsorbed water controlled the magnitude of flow of wood. Moreover, according to the analysis of water state by the Hailwood-Horrobin equation, it was shown that the function of dissolved water to the fluidity is almost identical for both chemical modifications, whereas hydrated water has more effect on acetylated wood than on formaldehydetreated wood. We speculate that the motion of water molecules due to quenching accompanied with the redistribution of energy resulting from the exchange of their potential energy and movement to attain a new balance, and the introduced acetyl groups and cross-linking restrict the water molecule movement.

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Authors and Affiliations

  1. Research Division of Agriculture, Graduate School of Kyoto Prefectural University, Kyoto, 606-8522, Japan

    Yue Wang, Kazuya Minato & Ikuho Iida

Authors
  1. Yue Wang
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  2. Kazuya Minato
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  3. Ikuho Iida
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Correspondence to Ikuho Iida.

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An erratum to this article is available at http://dx.doi.org/10.1007/s10086-006-0884-2.

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Wang, Y., Minato, K. & Iida, I. Mechanical properties of wood in an unstable state due to temperature changes, and analysis of the relevant mechanism III: effect of quenching on stress relaxation of chemically modified woods. J Wood Sci 53, 94–99 (2007). https://doi.org/10.1007/s10086-006-0831-2

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  • DOI: https://doi.org/10.1007/s10086-006-0831-2

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