Thermal properties of wood fiber networks Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/1r66j394n

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  • The standard (ASTM) steady-state method for determining the thermal conductivity of insulating materials (like wood based composite materials) is time-consuming, and its use is therefore limited to dry material; moisture migration occurs in hydrated materials and this limits accuracy. The proposed unsteady-state method is fast and therefore enables thermal properties of hygroscopic materials to be measured. The specimens are pressed by hot platens and the temperature rise inside them is measured. By comparing experimental data with the theoretical solutions of the "heat equation", thermal properties are determined using error minimization computer programs. The thermal properties of wood fiber networks have been measured as a function of density and moisture content. The results will be used in computer models which simulate the hot pressing of wood based composites.
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