Browsing by Author "Antoniuk, Viktoria"
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Item Modelling of controlled drug release from the solid phase through hydrogel membranes(Видавництво Львівської політехніки, 2013) Melnyk, Yuriy; Dzyaman, Iryna; Antoniuk, Viktoria; Skorokhoda, VolodymyrThe cross-linked copolymers of the 2-hydroxyethylmethacrylate with polyvinylpyrrolidone as granules and membranes were synthesized and their penetration and sorption-desorption properties were investigated. The masstransfer model of hard soluble surface through the hydrogel shell was offered. The developed materials are able to creation as capsule and granule polymer forms of the substances prolonged freeing.Item Rheological properties of compositions based on modified polyvinyl alcohol(Видавництво Львівської політехніки, 2017-12-23) Antoniuk, Viktoria; Krasinskyi, Volodymyr; Khamula, Natalia; Yurkiv, Iryna; Lviv Polytechnic National UniversityDeveloped of a method for producing structured waterproof films based on polyvinyl alcohol (PVA) and montmorillonite-polyvinylpyrrolidone mixture (MPM) to research the impact of borax, pH-environment and MPM content on the rheological properties PVA solutions and water absorption capacity of films based on them. The MPM mixture significantly affects on viscosity the characteristics of the solution polyvinyl alcohol provided their mixing in the ultrasonic field have been established. Composition of traces of sodium tetraborate in the aqueous solution eminent by the highest rates of viscosity. Also, designed compositions considerable influence pH at the viscosity, particularly compositions obtained in weakly alkaline environment with higher values of relative viscosity than compositions obtained in neutral and acidic environments.