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Enthalpy relaxation behavior of dry wood detected by temperature-modulated differential scanning calorimetry



Enthalpy relaxation behavior of dry wood detected by temperature-modulated differential scanning calorimetry



Journal of Wood Science 58(5): 391-398



Enthalpy relaxation of dry wood has been investigated by temperature-modulated differential scanning calorimetry. The reversing and non-reversing heat flow changes revealed that enthalpy relaxation occurred in dry wood, which did not exhibit any clear glass transitions. This enthalpy relaxation behavior seemed to differ significantly from those of previously reported isolated lignins, which implies that the microstructure of dry wood possesses a rigid amorphous state derived from interactions among wood components. The observed enthalpy relaxation is considered to be related to other components besides lignin, and the time-dependent physical properties due to unstable states or physical aging of wood originate not only from lignin but also from other components, such as cellulose and hemicellulose and the interactions between them.

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Accession: 036399662

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DOI: 10.1007/s10086-012-1264-8


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