Preservation of beech and spruce wood by allyl alcohol-based copolymers

End‐Grained Wood‐Polyurethane Composites, 2

“…The higher reductions of swelling were obtained for impregnation with MMA/AA mixture. The ASE values were close to 50% after water soaking for 30 d. [5] Comparison of stabilization effect with other vinylic polymers, such as poly(methyl methacrylate) (PMMA) and polystyrene (PS), with respect to poly(ethylene glycol) (PEG) has also been carried out. It demonstrates the ability of PEG to improve the dimensional stability of several wood species in contrast to PMMA and PS.…”

“…[1][2][3][4][5][6][7] The stability improvement is quantified through the determination of the antiswelling efficiency (ASE), i.e. the reduction of swelling of treated wood with respect to untreated wood.…”

Wood-Polymer Composites

“…Polymer loading is also affected by impregnation method and monomer properties, such as viscosity, boiling point (evaporation during cure), polarity, molecular weight, and shrinkage with polymerization (Ellis, 2000). However, all WPC samples tested in these studies were found to be harder than their corresponding untreated wood samples (Şolpan & Güven, 1999b;Li et al, 2009aLi et al, , 2010aLi et al, , 2011a.…”

“…14b) in the SEM morphologies of styrene-treated wood (Razi & Raman, 2000;Li et al, 2009;2011a). (Fig.11) is used in the production of WPCs mostly in combination with other monomers because the polymer does not improve properties by itself Şolpan & Güven, 1999b). It is most frequently used with styrene, and less frequently with MMA, methyl acrylate, unsaturated polyester, diallyl phthalate, and vinylidene chloride.…”

“…The cobalt-60 radiation process does have some distinct advantages in making WPCs, such as the monomer can be stored at ambient conditions, as long as inhibitor is included, and the rate of free radical generation is constant for cobalt-60 and does not increase with temperature; terilization can be achieved simultaneously by gamma irradiation; the gamma radiation technique can be applied to any size of material due to its high penetration; natural wood grain and colour are retained, or an artificial, uniform colouring the material is possible. (Şolpan & Güven, 1999a;1999b). However, drawbacks include safety concerns, cost considerations and regulations needed when using radiation.…”