به روش حرارت مستقيم POPULUS NIGRA تهيه چوب پلاستيك از گونه

Making wood polymer composite using direct heat technique

Three poplar (Populus nigra) trees from Shastkola forest were cut and from them 5-7 cm thick boards were procured. When the board moisture content reached to 13%, they were cut in accordance whit ISO standard to prepare specimens for physical and mechanical tests. Specimens then were impregnated with styrene monomer, which was already mixed with the dye as well as benzoyl peroxide as an inititor. Impregnated specimens then were polymerized using direct heat by placing them in the oven. Physical and mechanical properties of Wood Polymer Composite (WPC) were measured and compared with those of untreated specimens. Results showed that WPC could increase wood density up to 90 percent and reduce tangential shrinkage as well as radial shrinkage up to 50 percent. All mechanical strengths were improved in WPC; among them, the highest rate belonged to the compression strength perpendicular to the grain with 345 percent, and the lowest rate was related to compact with 16 percent.