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    Author(s): Daniel J. Yelle; John Ralph
    Date: 2016
    Source: Proceedings of the International Conference on Polyphenols, July 11-15, 2016, Vienna, Austria. Ed.: Krebs, Heinz A. Publisher: pp. 170-171.
    Publication Series: Full Proceedings
    Station: Forest Products Laboratory
    PDF: Download Publication  (302.0 KB)


    Latewood from Pinus taeda was reacted with alkaline phenol–formaldehyde (PF) adhesive and characterised using two-dimensional 1H–13C solution-state nuclear magnetic resonance (NMR) spectroscopy so that chemical modification of the wood cell wall polymers, after PF resol curing, could be elucidated. The results showed depletion in native lignin linkages via alkaline hydrolysis along with confirmation of newly formed diarylmethanes (methylene bridges) between guaiacyl lignin units and phenolic methylols.

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    Yelle, Daniel J.; Ralph, John. 2016. Phenol-formaldehyde reactivity with lignin in the wood cell wall. In: Proceedings of the International Conference on Polyphenols; Krebs, Heinz A., Ed. 11-15 July 2016. Vienna, Austria. Ed.: Publisher: pp. 170-171.


    Lignin, NMR, adhesives, phenol-formaldehyde

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