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    Wyświetlanie 1-4 z 4
    Tytuł:
    Prediction of changes in properties of pipes from polyethylene in the research of simulation of ageing
    Autorzy:
    Gnatowski, A.
    Chyra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/105768.pdf
    Data publikacji:
    2015
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    pipes
    polyethylene
    ageing
    thermal properties
    mechanical properties
    colour
    gloss
    rury
    polietylen
    starzenie
    właściwości termiczne
    właściwości mechaniczne
    kolor
    szkło
    Opis:
    This study presents a comparative analysis of specimens before and after photochemical and electrochemical ageing processes. The specimens were cut out of the pipes obtained through extrusion. The examinations were carried out for two commercial grades of polyethylene. Ageing with UV radiation was carried out using a gas discharge lamp, whereas simulation of electrochemical ageing was performed in a water solution of NaCl. Tensile strength testing, differential scanning calorimetry, colour and gloss measurements and hardness testing using the method of ball indentation were carried out for both types of specimens (after ageing and without ageing). Analysis of the results of the examinations revealed that ageing caused significant changes in properties of the specimens. In the samples after ageing was observed decrease in tensile strength. Found a decrease in the degree of crystallinity and changing temperatures physical changes. In the samples after ageing was observed different values of the parameters describing the colour. In samples after ageing also reported a reduction in gloss and hardness.
    Źródło:
    Acta Innovations; 2015, 16; 39-47
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermomechanical properties of polyamide 6 with addition of fly ash from biomass
    Autorzy:
    Gnatowski, A.
    Chyra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/105830.pdf
    Data publikacji:
    2017
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    polyamide
    composites
    fly ash
    thermomechanical properties
    colour
    microstructure
    poliamid
    kompozyty
    popiół lotny
    właściwości termomechaniczne
    kolor
    mikrostruktura
    Opis:
    Modification of polymer materials by various kinds of fillers is presently applied very often in massive production. This is due to the need for materials with better properties and lower prices for parts. One of the newest solutions is the filling of polymers with fly ash. This results in a change in products properties and reduction the amount of waste in the form of ashes. This article shows the results of investigations of thermomechanical properties of polyamide 6 modified by fly ash from the combustion of biomass. Comparative analysis of unfilled polyamide and polyamide composites with the addition of 5%, 10% and 15% of fly ash was performed. The specimens were obtained using injection moulding technology. The commercial name for the Polyamide 6 used in this study is TARNAMID T-27 and was manufactured by Zakłady Azotowe Tarnów. Fly ash manufactured by GDF Suez Energia Polska S.A. was applied as a filler. The investigations of mechanical properties were made using a harness by pressing ball method, impact strength by Charpy method and tensile strength. Differential scanning calorimetry (DSC), softening temperature by Vicat, and colour investigations were also performed. Pictures of microstructure were made.
    Źródło:
    Acta Innovations; 2017, 25; 38-46
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of processing parameters on properties of polyamide filled with glass balls
    Autorzy:
    Gnatowski, A.
    Chyra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/105952.pdf
    Data publikacji:
    2016
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    polyamide
    composites
    glass balls
    thermomechanical properties
    poliamid
    kompozyty
    kulki szklane
    właściwości termomechaniczne
    Opis:
    Comparative analysis of thermomechanical properties of polyamide and polyamide composites with addition of 30% of glass balls was performed. The specimens were obtained using the injection moulding technology by means of KraussMaffei KM65-160C1 injection moulding machine. The non-filled polyamide and part of components were injected using the parameters recommended by the manufacturer. A reduced value of mould cooling temperature was used for the other non-filled specimens. The differential scanning calorimetry (DSC), hardness testing, impact strength testing, bending resistance and dynamic mechanical thermal analysis (DMTA) were also performed.
    Źródło:
    Acta Innovations; 2016, 20; 5-12
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of welded and adhesive joints strength made of acid-resistant stainless steel sheets
    Autorzy:
    Rudawska, A.
    Pawlak, P.
    Miturska, I.
    Stančeková, D.
    Chyra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/102070.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    adhesive joints
    welded joints
    strength
    acid resistant steel
    Opis:
    The article presents the selected results of strength tests on the effectiveness of bonding high-alloy steel 1.4310. Sheet steel is one of the materials that are difficult to activate energy. Effective joining of it is difficult, requires selection of the appropriate bonding technology. The paper focuses on the comparative tests of shear strength of one-single lap welded and bonded joints. The welding process was performed on 3 groups of samples TIG welding and argon, where the variable value of the welding process was current: 60A, 70A, 80A. The adhesion process was performed in 6 groups of samples which differed in the method of surface preparation and the type of the adhesive. Adhesive joints were made by using adhesive of epoxy resin and a hardener: Epidian 61/TFF at a mass ratio of 100:22 and Epidian 61/IDA at a mass ratio of 100:40. As a way of surface preparation applied 3 different, but simplified and environmentally friendly methods of surface preparation: degreasing with using cleaner Loctite 7061, abrasive machining with P320 and degreasing and grinding with abrasive T800 and degreasing were used. Make joints and curing the adhesive joints were carried out at ambient temperature. Analyzed the joints were tested destructive – which set out the shear strength, in accordance with DIN EN 1465 on the testing machine Zwick / Roell Z150. Based on the results of the research it was found that better results were obtained for the maximum welded joints, but this result was similar to the maximum value of the strength of the adhesive bond.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 97-102
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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