MODIFICATION OF LOW-MOLECULAR COPOLYMER FROM BY-PRODUCTS OF BUTADIENE RUBBER BY SECONDARY EXPANDED POLYSTYRENE

From the literature data it is known that in industrial and civil construction it is widely used expanded polystyrene as a heat-insulating material, which is in demand on the market. In order to solve a number of ecological problems, in this work attempts have been made to chemically combine two types of polymer waste (by-products of petrochemistry in the presence of expanded polystyrene) to obtain impregnating compounds at the molecular level by carrying out their joint destruction and applying wood products for protective treatment. Obtained wood-polymer composites from natural wood (birch) and wood fiber boards (DVP) were investigated for resistance to water and moisture. Indicators of tests of wood for water absorption and swelling in the radial and tangential directions indicate that the samples under investigation have increased hydrophobic properties. Modified fiberboards acquire, in addition to increased hydrophobic properties and higher strength parameters. This is due to the cross-linking of oligomer molecules in wood structures with the formation of a wood-polymer framework and the formation of hydrogen and ether bonds between the wood components and the oxidized modified oligomer. The formation of such bonds makes it possible to reduce such a shortage of impregnating compositions as washability from products during their operation. Reducing the uncertainty of the oligomeric modifier reduces its hydrophilic properties. Integrated use of waste and by-products allows to purposefully dispose of them and use them for protective processing of materials, which include wood components, which contributes to the increase of the service life of products.