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    Wyświetlanie 1-7 z 7
    Tytuł:
    Effect of small additives of polyamide modified by polyvinylpyrrolidone and montmorillonite on polypropylene technological properties and heat resistance
    Autorzy:
    Krasinskyi, Volodymyr
    Suberlyak, Oleh
    Kochubei, Viktoria
    Klym, Yurii
    Zemke, Viktoria
    Jachowicz, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/102461.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    polypropylene
    polyamide
    montmorillonite
    polyvinylpyrrolidone
    mixture
    nanocomposite
    modification
    thermal analysis
    polipropylen
    poliamid
    montmorylonit
    poliwinylopirolidon
    mieszanina
    nanokompozyt
    modyfikacja
    analiza termiczna
    Opis:
    The effect of small polyamide additives modified with polyvinylpyrrolidone and montmorillonite on polypropylene technological properties and heat resistance has been researched in the work. It has been determined that the melt flow index of the obtained composites increases by more than 2 times in comparing with pure PP. It has been shown that adding a small amount of polyamide modified by montmorillonite-polyvinylprolidone mixture to polypropylene significantly increases heat resistance of the material. The displacement of the beginning of thermal-oxidation destruction and burning samples into the range of higher temperatures on 114-123oC, dependently on the modified polyamide content has been observed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 2; 83-88
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence and optimization of the setting of input parameters of laser profilometry by the surface measurement manufactured by the AWJ technology
    Autorzy:
    Mitaľ, Gerhard
    Gajdoš, Ivan
    Ružbarsky, Juraj
    Jachowicz, Tomasz
    Majewski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/102196.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    AWJ
    laser
    measurement
    roughness
    profilometry
    contactless
    contact
    method
    pomiary
    chropowatość
    profilometria
    kontakt
    metoda
    Opis:
    The publication deals with the measurement and evaluation of roughness parameters by means of laser profiling, and its main task is to determine the effect of selecting the internal gain adjustment (Gain mode) on measured roughness values of the surface treated by the water beam technology. The publication details the software, hardware, and other parts of the device designed to measure the roughness of different types of surfaces. It further describes the behavior of individual parts of the apparatus as a whole and methods of measuring the roughness of the surface along a defined profile section by means of the triangulation principle of laser profiling. The measured sample was cut by a thick (rough) cut at pressure of 380 MPa. As an abrasive, the Australian Grenade with the grain Mesh 50 was used.The experiment was carried out at the Faculty of Production Technologies in the Laboratory of Roughness Measurement at the Department of technical systems design and monitoring in Prešov. Measurement of surface roughness parameters was performed on an optical measuring system to control surface parameters and the contact roughness meter Mitutyo SJ400.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 1; 329-337
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Nature and Amount of Polypropylene Composite Filler on the Productivity of Extruder with the Cylinder Equipped with Grooves
    Autorzy:
    Krasinskyi, Volodymyr
    Moravskyi, Volodymyr
    Suberlyak, Oleh
    Sikora, Janusz W.
    Jachowicz, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/101980.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    extrusion
    polypropylene
    filler
    extruder
    screw
    barrel design
    active grooved feed section
    wytłaczanie
    polipropylen
    wypełniacz
    wytłaczarka
    ślimak
    konstrukcja beczki
    aktywny rowek podający
    Opis:
    The effect of grooves number in the feed section and screw length as well as filler nature and content on the productivity of single-screw extruder has been examined. Compositions based on polypropylene with glass fibers, talc and chalk were used for research. It is established that the number of grooves in the feed section and the length of the screw differently affect the productivity of a single screw extruder depending on the nature and content of the filler. This effect is shown to be most significant for polypropylene compositions with mineral powders (talc and chalk).
    Źródło:
    Advances in Science and Technology. Research Journal; 2019, 13, 4; 264-269
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanocomposites Based on Polyamide and Montmorillonite Obtained from a Solution
    Autorzy:
    Krasinskyi, Volodymyr
    Suberlyak, Oleh
    Kochubei, Viktoria
    Jachowicz, Tomasz
    Dulebova, Ludmila
    Zemke, Viktoria
    Powiązania:
    https://bibliotekanauki.pl/articles/101953.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    polyamide
    montmorillonite
    polyvinylpyrrolidone
    nanocomposite
    modification in solution
    structure
    poliamid
    montmorylonit
    poliwinylopirolidon
    nanokompozyt
    modyfikacja w roztworze
    struktura
    Opis:
    This work deals with the development of a method for obtaining polyamide and montmorillonite based nanocomposite, which was modified with polyvinylpyrrolidone by mixing in a formic acid solution. The structure and thermophysical properties of the obtained nanocomposites were investigated by means of the X-ray, differentialthermal, thermogravimetric and IR spectroscopic analyses. It was found that nanomodified polycaproamide has a higher crystallinity and higher thermal stability than the original PA-6, and is characterized by considerably higher melt fluidity. The presence of polyvinylpyrrolidone and exfoliated montmorillonite in the nanocomposite structure was confirmed experimentally.
    Źródło:
    Advances in Science and Technology. Research Journal; 2020, 14, 3; 192-198
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Manufacturing of Composite Materials in the Matrix of Modified Phenol-Formaldehyde Resins
    Autorzy:
    Krasinskyi, Volodymyr
    Jachowicz, Tomasz
    Dulebova, Ludmila
    Gajdoš, Ivan
    Malinowski, Rafał
    Powiązania:
    https://bibliotekanauki.pl/articles/2023485.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    modification
    polyvinylpyrrolidone
    phenol-formaldehyde resins
    epoxy resin
    adhesion strength
    modyfikacja
    poliwinylopirolidon
    żywice fenolowo-formaldehydowe
    żywica epoksydowa
    siła przylegania
    Opis:
    The work develops the method of obtaining new composite materials based on novolac phenol-formaldehyde resin with improved adhesion properties and heat resistance. The composites were obtained by chemical modification of phenol-formaldehyde resin by epoxy resin and polyvinylpyrrolidone during the hardening of the composition. The mechanism of resins modification and hardening has been determined. It is shown that due to the modification, the heat resistance and adhesive strength of the obtained enamels and coatings have significantly increased. In particular, with the polyvinylpyrrolidone content from 0.5 to 1 wt% and epoxy resin from 25 to 50 wt%, the adhesive strength of the compositions increases 5-7 times.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 4; 267-272
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of the Properties of Modified Phenol-Formaldehyde Composites Using Mathematical Modeling of the Composition of the Polymer Mixture
    Autorzy:
    Krasinskyi, Volodymyr
    Jachowicz, Tomasz
    Malinowski, Rafał
    Bajer, Krzysztof
    Dulebova, Ludmila
    Powiązania:
    https://bibliotekanauki.pl/articles/2201811.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    phenol-formaldehyde resins
    epoxy resin
    polyvinylpyrrolidone
    adhesion strength
    regression equation
    Scheffe test
    Scheffe’s method
    Opis:
    The paper presents the results of studies of adhesive strength under shearing, thermal stability, and the content of the gel fraction of adhesive materials and enamels based on modified phenol-formaldehyde resins. Epoxy resin and polyvinylpyrrolidone were used to modify the phenol-formaldehyde resin. The influence of the content of components in the phenol-formaldehyde composition and the curing conditions on the properties of the obtained adhesive materials and coatings is analyzed. The effect of polyvinylpyrrolidone on internal stresses in adhesive joints has been established. By mathematical planning, the isolines of the characteristics of composite materials based on modified phenol-formaldehyde resin depending on their component’s compositions are plotted, and the regression coefficients are found, enabling one to get materials with predicted properties. From a technical and economic point of view, the following content of additives in modified phenol-formaldehyde resin is most optimal: epoxy resin from 25 to 50 wt%, polyvinylpyrrolidone from 0.5 to 1.0 wt%, curing catalyst from 1 to 2.5 wt%.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 4; 138--146
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on the Mechanical Properties of C45 Steel with Martensitic Structure after a High Tempering Process
    Autorzy:
    Woźniak, Waldemar
    Sąsiadek, Michał
    Jachowicz, Tomasz
    Edl, Milan
    Zając, Paweł
    Powiązania:
    https://bibliotekanauki.pl/articles/2201724.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    steel
    heat treatment
    quenching
    tempering
    steel structure
    martensite structure
    martensitic structure
    Opis:
    This article describes the studies of the mechanical properties of the martensitic structure of C45 steel, obtained as a result of heat treatment. This steel was subjected to high tempering, within the temperature range of 500 ÷ 700°C (every 50°C) and for various exposure times, from 15 minutes to 23 hours. Moreover, martensitic steel was subjected to tests by quenching at a temperature of 850°C for 20 minutes and then tempering it for 1 hour, within the temperature range of 50 ÷ 800°C (every 50°C). The resulting steel samples were subjected to strength tests, that is, to tensile and hardness tests and also to tests on the micro-structure. The results of these studies are presented and discussed, in detail, in terms of their practical application.
    Źródło:
    Advances in Science and Technology. Research Journal; 2022, 16, 3; 306--315
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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