Litteris et Artibus

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    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 University
    Developed 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.
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    Sorption properties of metal-containing polymer-silicate fillers
    (Lviv Polytechnic Publishing House, 2015) Masyuk, Andrii; Levytskyi, Volodymyr; Lviv Polytechnic National University
    Sorption properties of metal-containing polymersilicate fillers on regarding to different acid-base indicators have been investigated. The effect of the nature of metal and polymer modifier on the amount of active centers and specific active surface area of such material was determined. Moisture absorption of modified and not modified silicate materials has been found.