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Vapor phase reaction of wood with maleic anhydride (II): mechanism of dimensional stabilization

Abstract

The vapor phase reaction of wood with maleic anhydride (MA) was investigated from the aspect of the mechanism of dimensional stabilization. Notably the existence of cross-links was examined by detailed analyses of dimensional stability and related properties, diffuse reflectance infrared Fourier transform (DRIFT) spectra, and changes in mechanical properties such as creep property and vibrational property. Higher reaction temperature resulted in less leaching of reagent. Also a peak in DRIFT spectra at 1730 cm−1 showed the esterification of wood components with MA, while that at around 1780 cm−1, which became remarkable with increasing reaction temperature, suggested the formation of cross-linking. The loss tangent decreased and the creep deformation was restrained for the specimens treated at high temperature. From these results it is plausible that MA mainly forms monoester with wood components at lower temperature; however, at elevated temperature cross-linking appears in addition to formation of the monoester.

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Correspondence to Yoriko Iwamoto.

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Iwamoto, Y., Itoh, T. & Minato, K. Vapor phase reaction of wood with maleic anhydride (II): mechanism of dimensional stabilization. J Wood Sci 51, 601–606 (2005). https://doi.org/10.1007/s10086-005-0712-0

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Key words

  • Creep property
  • Dimensional stability
  • Maleic anhydride
  • Vapor phase reaction
  • Vibrational property