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Toshiyuki Asano, Masahiko Kobayashi, Bunichiro Tomita, Mikio Kajiyama
Syntheses and properties of liquefied products of ozone treated wood/epoxy resins having high wood contents
Keywords: glass transition temperature, liquefaction of wood, liquefied product, liquefied product/epoxy resins, mechanical property, ozone treatment of wood, tensile strength, viscoelastic property
Liquefied products with high wood content were prepared by pretreating wood with ozone before liquefaction. As a result, the ratio of wood to polyhydric alcohol (W/P ratio) used as solvent could be increased to 2:1. Resin blends were prepared by mixing liquefied products with ethylene glycol diglycidyl ether (EGDGE, water-soluble) and diglycidyl ether of bisphenol A (DGEBA, oily consistency). The wood content of the resin blend could be increased to 53%. The resins were cured by citric acid or triethylene tetramine (TETA), and their mechanical properties were evaluated. Dynamic mechanical measurements revealed that the former had higher glass transition temperatures than the latter. It was found that the resin with DGEBA cured by citric acid had almost the same level of tensile strength as commercial plastics.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 61, 01/2007
Pages: 14 - 18