This paper reports a research methodology for characterizing wound dressings in order to assess the application properties of medical devices as a whole. Wound dressing was based on grafting polymerization of N-vinyl caprolactam and 2-hydoxyethyl acrylate on polyvinyl alcohol. The obtained copolymer was characterized by FTIR. Cross-linked films of wound dressings were obtained by radiation treatment of the copolymers. The physico-mechemical properties of wound dressings were investigated. Testing included degree of swelling, elastic modulus, tensile strength and elongation at break. The radiation doses of the reaction affected physico-mechanical properties of wound dressings. As the dose of radiation increased, the yield of gel increased, degree of swilling and tensile strength decreased. Also, the results indicated that yield of the crosslinked fraction increases, and the swelling capacity of polymer mesh decreases with increasing 2-hydroxyethyl acrylate content in the graft copolymer

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Application of composite materials based on polyvinyl alcohol in phytoremediation soilOil production, transportation, transshipment and storage lead to accidental soil pollution with oil products. To solve this problem, the researchers proposed the possibility of using polymer films for the rehabilitation of oilcontaminated soils. In the present work, in order to clean the soil from oil products, films based on polyvinyl alcohol and chitosan were obtained, their main physical and mechanical properties were investigated. The results of IR spectrometric analysis showed good compatibility of the starting components. It was found that the films obtained possess rather high indices of mechanical strength. Moreover, films containing 80 % synthetic polymer -PVA showed the highest mechanical properties. The latter is apparently associated with the formation of a network of intermolecular hydrogen bonds between chitosan and PVA, which favorably affects their operational characteristics. Pollution modeling was carried out by applying oil to the soil of the Karazhanbass field. The resulting films based on polyvinyl alcohol and chitosan were used as recultivates, which were applied in concentrations of 0.2 g/kg of soil. The effectiveness of remediation of oil-contaminated soils was evaluated by measuring the content of oil products and conducting phytotests of the studied soil samples. The results of the assessment of the degradation of oil products in the process of reclamation and the phytotesting indicators obtained in the dynamics of the experiment allow us to conclude the effectiveness and feasibility of using polymer films based on polyvinyl alcohol and chitosan to clean oil-contaminated soils.

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Materials able to decompose safely are very important for solving the environmental problems. In this paper, the preparation conditions of biodegradable film based on polyvinyl alcohol (PVA) and starch were studied. IR-spectroscopy analysis showed that during the synthesis, copolymers connect with each other via hydrogen bonds. The films synthesized on the basis of PVA and starch have been subjected to γ-radiation. They have shown the improved characteristics on strength, elasticity and durability in various solvents at the expense of the polymeric components sewed by hydrogen bonds. Possibilities for application of the films as a biodegradable material were shown.