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    Wyświetlanie 1-7 z 7
    Tytuł:
    Welcome to the Journal of Casting and Materials Engineering
    Autorzy:
    Grabowska, B.
    Górny, M.
    Brzeziński, M.
    Jakubski, J.
    Bobrowski, A.
    Kaczmarska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/106971.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    wstęp
    nota edytorska
    introduction
    editorial
    Źródło:
    Journal of Casting & Materials Engineering; 2017, 1, 1; 1
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of method for identification of compounds emitted during thermal degradation of binders used in foundry
    Autorzy:
    Kubecki, M.
    Holtzer, M.
    Grabowska, B.
    Bobrowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382510.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry binder
    furan resin
    gas chromatography
    mass spectrometry
    spoiwo odlewnicze
    żywica furanowa
    chromatografia gazowa
    spektrometria masy
    Opis:
    The aim of the research was to develop a method for identification of compounds emitted during thermal degradation of binders used in foundry. Research were performed with the use of Certified Reference Materials mixtures of semi-volatiles compounds with furfuryl alcohol and aldehyde. Furfuryl-urea resin samples were also used. Station for thermal degradation of materials used in foundry was designed and made. Thermal degradation process conditions and gas chromatograph coupled with high resolution mass spectrometry operating conditions were established. Organic compounds emitted during degradation were identified. The paper briefly represents the range of study and the results obtained for furfuryl-urea resin thermal degradation. Significant information about volatile and semi-volatile organic compounds emitted in different temperatures is also discussed.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the compounds from the BTEX group, emitted during thermal decomposition of alkyd resin
    Autorzy:
    Kubecki, M.
    Holtzer, M.
    Bobrowski, A.
    Dańko, R.
    Grabowska, B.
    Żymankowska-Kumon, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/380216.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    masa formierska
    wiązanie
    BTEX
    analiza termiczna
    GC-MS
    moulding sand
    binding
    thermal analysis
    Opis:
    Suitability of the given binding agent for the moulding sands preparation depends on the one hand on the estimation of technological properties of the sand and the mould made of it and the obtained casting quality and on the other hand on the assessment of this sand influence on the natural and working environment. Out of moulding sands used in the foundry industry, sands with organic binders deserve a special attention. These binders are based on synthetic resins, which ensure obtaining the proper technological properties and sound castings, however, they negatively influence the environment. If in the initial state these resins are not very dangerous for people and for the environment, thus under an influence of high temperatures they generate very harmful products, being the result of their thermal decomposition. Depending on the kind of the applied resin (phenol-formaldehyde, urea, furfuryl, urea-furfuryl, alkyd) under an influence of a temperature such compounds as: furfuryl alcohol, formaldehyde, phenol, BTEX group (benzene, toluene, ethylbenzene, xylene), and also polycyclic aromatic hydrocarbons (PAH) can be formed and released. The aim of the study was the development of the method, selection of analytical methods and the determination of optimal conditions of formation compounds from the BTEX group. An emission of these components constitutes one of the basic criteria of the harmfulness assessment of binders applied for moulding and core sands. Investigations were carried out in the specially designed set up for the thermal decomposition of organic substances in a temperature range: 5000C - 13000C at the laboratory scale. The object for testing was alkyd resin applied as a binding material for moulding sands. Within investigations the minimal amount of adsorbent necessary for the adsorption of compounds released during the decomposition of the resin sample of a mass app. 15 mg was selected. Also the minimal amount of solvent needed for the desorption of compounds adsorbed in the column with adsorbent was found. The temperature range, in which the maximal amounts of benzene, toluene, ethylobenzene and xylenes are released from the resin, was defined. The qualitative and quantitative analyses of compounds from the BTEX group were performed by means of the gas chromatography combined with the mass spectrometry (GC/MS).
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 69-74
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermoanalytical Studies (TG-DSC, FTIR-DRS) of the Moulding Sand with the Polymer BioCo2 Binder
    Autorzy:
    Grabowska, B.
    Bobrowski, A.
    Grabowski, G.
    Łucarz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381765.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    polymeric binders
    thermoanalytical methods
    thermogravimetry
    moulding sands
    spoiwo polimerowe
    metody termoanalityczne
    termograwimetria
    Opis:
    The publication presents the results of thermal examinations conducted to determine of the thermal degradation of the polymeric binder (BioCo2) in the moulding sand. Thermal degradation process was identified using literature data on the decomposition of the polymers materials and based on own research (TG-DSC, MIR-DRS). In order to determine the degradation temperature and the thermal effects of transformations occurring when the moulding sand were heated, two methods were used: the thermogravimetry (TG) and differential scanning calorimetry (DSC). In this paper the spectroscopic studies (MIR-DRS) were also performed in order to elucidate structural changes occurring in the BioCo2 binder under an influence of heating. Temperature spectra were made for the moulding sand sample in the temperature range: 25-400oC (operation range of the temperature attachment of the IR spectrometer). The heating process was performed in a continuous way, and the spectra were recorded at a given temperature. On the bases of the performed thermal analysis of the moulding sand the temperature range required for the efficient thermal reclamation was indicated.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 27-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of Poly(Acrylic Acid-co-Maleic Acid) Sodium Salt Intercalated Montmorillonite
    Autorzy:
    Grabowska, B.
    Cukrowicz, S.
    Kurleto-Kozioł, Ż.
    Kaczmarska, K.
    Drożyński, D.
    Sitarz, M.
    Bobrowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382199.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry
    hybrid materials
    montmorillonite
    lustrous carbon
    intercalation
    odlewnia
    materiały hybrydowe
    montmorylonit
    węgiel
    Opis:
    The intercalation into interlayer spaces of montmorillonite (MMT), obtained from natural calcium bentonite, was investigated. Modification of MMT was performed by the poly(acrylic acid-co-maleic acid) sodium salt (co-MA/AA). Efficiency of modification of MMT by sodium salt co-MA/AA was assessed by the infrared spectroscopic methods (FTIR), X-ray diffraction method (XRD) and spectrophotometry UV-Vis. It was found, that MMT can be relatively simply modified with omitting the preliminary organofilisation – by introducing hydrogel chains of maleic acid-acrylic acid copolymer in a form of sodium salt into interlayer galleries. A successful intercalation by sodium salt of the above mentioned copolymer was confirmed by the powder X-ray diffraction (shifting the reflex (001) originated from the montmorillonite phase indicating an increase of interlayer distances) as well as by the infrared spectroscopy (occurring of vibrations characteristic for the introduced organic macromolecules). The performed modification causes an increase of the ion exchange ability which allows to assume that the developed hybrid composite: MMT-/maleic acid-acrylic acid copolymer (MMT-co- MA/AA) can find the application as a binding material in the moulding sands technology. In addition, modified montmorillonites indicate an increased ability for ion exchanges at higher temperatures (TG-DTG, UV-Vis). MMT modified by sodium salt of maleic acid-acrylic acid copolymer indicates a significant shifting of the loss of the ion exchange ability in the direction of the higher temperature range (500–700°C).
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 67-75
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal Deformation of Moulding and Core Sands with an Inorganic Binder Containing a Relaxation Additive
    Autorzy:
    Bobrowski, A.
    Drożyński, D.
    Jakubski, J.
    Szumera, M.
    Kaczmarska, K.
    Grabowska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/381739.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    moulding sand
    inorganic binder
    geopolymer binder
    thermal deformation
    dilatometric studies
    masa formierska
    spoiwo nieorganiczne
    spoiwo geopolimerowe
    odkształcanie termiczne
    badania dylatometryczne
    Opis:
    The paper presents the results of an investigation of the thermal deformation of moulding sands with an inorganic (geopolymer) binder with a relaxation additive, whose main task is to reduce the final (residual) strength and improves knocking-out properties of moulding sand. The moulding sand without a relaxation additive was the reference point. The research was carried out using the hot-distortion method (DMA apparatus from Multiserw-Morek). The results were combined with linear deformation studies with determination of the linear expansion factor (Netzsch DIL 402C dilatometer). The study showed that the introduction of relaxation additive has a positive effect on the thermal stability of moulding sand by limiting the measured deformation value, in relation to the moulding sand without additive. In addition, a relaxation additive slightly changes the course of the dilatometric curve. Change in the linear dimension of the moulding sand sample with the relaxation additive differs by only 0.05%, in comparison to the moulding sand without additive.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 93-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza związków z grupy BTEX powstających podczas termicznego rozkładu żywicy alkidowej
    Analysis of the compounds from the BTEX group emitted during thermal decomposition of alkyd resin
    Autorzy:
    Kubecki, M.
    Holtzer, M.
    Bobrowski, A.
    Dańko, R.
    Grabowska, B.
    Żymankowska-Kumon, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/381040.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    masa formierska
    żywica syntetyczna
    związek BTEX
    rozkład termiczny
    chromatografia gazowa
    spektrometria masowa
    moulding sand
    synthetic resin
    BTEX compounds
    thermal decomposition
    gas chromatography
    mass spectrometry
    Opis:
    Przydatność danego spoiwa do sporządzania mas formierskich obejmuje z jednej strony ocenę właściwości technologicznych samej masy i wykonanej z niej formy i jakości otrzymanego odlewu, a z drugiej strony ocenę wpływu tej masy na środowisko naturalne i środowisko pracy. Z pośród mas stosowanych w przemyśle odlewniczym na szczególną uwagę zasługują masy ze spoiwami organicznymi. Spoiwa te oparte są na żywicach syntetycznych, które z jednej strony zapewniają uzyskanie przez masę odpowiednich właściwości technologicznych i otrzymanie dobrych odlewów, ale z drugiej negatywnie oddziałują na środowisko. O ile w stanie wyjściowym żywice te tylko w niewielkim stopniu stanowią zagrożenie zarówno dla ludzi jak i środowiska, to pod wpływem temperatury generują bardzo szkodliwe produkty, będące wynikiem ich termicznego rozkładu. W zależności od rodzaju stosowanej żywicy (fenolowo-formaldehydowej, mocznikowej, furfurylowej, furfurylowo–mocznikowej, alkidowej) pod wpływem temperatury mogą tworzyć się i uwalniać takie związki jak: alkohol furfurylowy, formaldehyd, fenol, związki z grupy BTEX (benzen, toluen, etylobenzen, ksyleny), a także wielopierścieniowe węglowodory aromatyczne (WWA). [...]
    Suitability of the given binding agent for the moulding sands preparation depends on the one hand on the estimation of technological properties of the sand and the mould made of it and the obtained casting quality and on the other hand on the assessment of this sand influence on the natural and working environment. Out of moulding sands used in the foundry industry, sands with organic binders deserve a special attention. These binders are based on synthetic resins, which ensure obtaining the proper technological properties and sound castings, however, they negatively influence the environment. If in the initial state these resins are not very dangerous for people and for the environment, thus under an influence of high temperatures they generate very harmful products, being the result of their thermal decomposition. Depending on the kind of the applied resin (phenol-formaldehyde, urea, furfuryl, urea–furfuryl, alkyd) under an influence of a temperature such compounds as: furfuryl alcohol, formaldehyde, phenol, BTEX group (benzene, toluene, ethylbenzene, xylene), and also polycyclic aromatic hydrocarbons (PAH) can be formed and released. [...]
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 119-124
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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