بررسي خواص فيزيكي چند سازه چوب - پليمر گونه هاي پالونيا، سپيدار، افراپلت و ممرز

Investigation of physical properties of wood-polymer composites from palownia, aspen, maple, and hornbeam species

This research has been carried out for the purpose of providing wood-polymer composites from palownia, aspen, maple, and hornbeam species; In order for improving their physical properties and enhancing their applicability in industries. Styrene was chosen as a monomer for impregnation. In order to achieve the above mentioned goal; the specimens were first impregnated with styrene monomer which was already mixed with ethylene glycol dimetacrylate as well as benzoyl peroxide as an initiator. Full cell process with the exception of final vacuum was applied for impregnation. Impregnated specimens were then heated in order to polymerize the monomer by placing them in the oven. After the preparing wood- polymer composite, evaluation and comparison of the physical properties (specific gravity, swelling, and shrinkage) in control specimens and wood-polymer composite specimens were done. The analysis of data and results reveal the improvement of physical properties of all 4 species comparing to the (control) untreated specimens. Specific gravity increased in wood- polymer composites as follows: Palownia species 154.93, aspen species 127.75, maple species 47.73 and hornbeam 37%. Also the percentage of increase, in dimensional stability of palownia wood polymer composite was 36, aspen 33.56, maple 30.09, and hornbeam 22.90