ADHESIVE INTERACTION OF CONTACT SURFACES IN A COMPOSITE AND THEIR CHARACTERISTICS
In the context of the development of scientific and technical concepts, the industry of polymer building composites is acquiring an increasingly dynamic character, where a significant segment is occupied by wood - polymer composites in the form of construction and finishing materials, floor coverings. Although there are adequate optimization models for the quantitative formulation of composites, there are no generally accepted concepts in terms of the type of components, the quality or nature of the adhesive contact, especially at the filler - binder interface. Therefore, the purpose of this work was to study the nature of the adhesive interaction between wood and oligomers from the standpoint of the acid - base theory and the wetting angle to optimize the wood - polymer floor covering from the end block. The objects of the study were samples of coniferous and deciduous woods in the form of pine, birch, oak, impregnated with organic binders based on paraffin, wax and pentaphthalic resin. The surface characteristics were studied by the van Oss - Choderi - Hood method using the acid - base theory and measuring the contact angle of wetting with test liquids. The physical and mechanical properties of the original and impregnated wood were determined by standard methods on a test bench. A correlation was established between the dynamic and thermodynamic parameters of the original and impregnated wood. A regular change in the surface contact between wood and the type of oligomer is shown, which is accompanied by an increase in compressive strength up to 60-80% and resistance to water absorption and swelling exceeding the control sample by 5-10 times. Based on the research results, recommendations were formulated for modifying the studied rock composition in the resulting series of modifiers paraffin, wax, resin, where essential - 0.39, 4.78, 13.89 (%) increase in polarity, respectively.