Moisture Adsorption and Swelling in Polyethylene Glycol and Polymethyl Methacrylate Treated Wood at High Relative Humidity

Howard N. Rosen

Abstract


The rates and amounts of swelling and moisture adsorption at 97% relative humidity and 24 C in untreated, polyethylene glycol of molecular weight 1000 (PEG-1000)-treated, and polymerized methyl methacrylate monomer (MMA)-treated yellow-poplar and silver maple were compared. Swelling and moisture adsorption were 60 to 90% slower in MMA-treated wood than in untreated wood. Antishrink efficiencies of MMA-treated wood ranged from 9 to 21%. The rate of moisture adsorption in PEG-1000-treated wood was faster than in untreated wood. Considerable moisture was adsorbed by the PEG-1000 in the cell cavities of the PEG-1000-treated wood. Antishrink efficiencies ranged from 82 to 92%.

Keywords


Adsorption;<i>Liriodendron tulipifera</i>;<i>Acer saccharinum</i>;diffusion;antishrink efficiency

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