Статті КТМ (ДМетІ)

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Browsing Статті КТМ (ДМетІ) by Author "Dyadyura, Konstantin"

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    Increasing of Wear Resistance of Linear Block-Polyurethanes by Thermal Processing Methods
    (2021) Panda, Anton; Anisimov, Volodymyr Mykolajovych; Anisimov, Volodymyr Volodymyrovych; Dyadyura, Konstantin; Pandova, Iveta
    ENG: A significant imperfection of parts made from linear block-polyurethanes under conditions of friction contact in the presence of water medium is an intensification of hydrolysis processes and reduction of bulk strength. In order to slow down the hydrolysis process, samples of the polyurethanes were subjected to three types of thermal impacts: thermal processing during some time, infrared and laser irradiations. It has been established that processing in thermal fields of different intensity allows 5-10 times increase of wear resistance of these materials during friction in water medium.
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    Wear Resistance Improvement of Linear Block-Polyurethanes under Conditions of Liquid Friction
    (De Gruyter Poland, 2021) Panda, Anton; Anisimov, Volodymyr Mykolajovych; Anisimov, Volodymyr Volodymyrovych; Dyadyura, Konstantin
    ENG: A significant disadvantage of parts made of linear block polyurethanes under conditions of friction contact in the presence of an aqueous medium is the intensification of hydrolysis processes and decrease in volume strength. It was proposed to slow down the hydrolysis of polyurethanes in three ways: by directed changes in chemical structure, by electromagnetic radiation of different intensities and by creation of composite materials, based on the principle of additional intermolecular crosslinking at the manufacturing and hot processing stages. The conditions for the formation of a smooth wear-resistant surface that protects the material from rapid destruction are revealed.