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Wyszukujesz frazę "Phenolic" wg kryterium: Temat

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Assessment of Harmfulness of Phenolic Resins Hardened by CO2 in an Aspect of Emission of Substances from BTEX and PAH Groups
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Dańko, R.
    Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380226.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    phenolic resin
    BTEX
    PAH
    foundry
    ochrona środowiska
    żywica fenolowa
    odlewnia
    Opis:
    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 under an influence of a temperature such compounds as: furfuryl alcohol, formaldehyde, phenol, BTEX group (benzene, toluene, ethylobenzene, xylenes), and also polycyclic aromatic hydrocarbons (PAHs) can be formed and released.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 39-43
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of a liquid metal temperature on a thermal decomposition of a phenolic resin
    Autorzy:
    Holtzer, M.
    Bobrowski, A.
    Dańko, R.
    Żymankowska-Kumon, S.
    Kolczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382247.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    phenolic resin
    BTEX compounds
    alluminium
    foundry
    ochrona środowiska
    żywica fenolowa
    związki typu BTEX
    aluminium
    odlewnictwo
    Opis:
    Due to the presence of harmful substances in resins those mould sands may be hazardous to the natural environment and workers. The general assessment of harmfulness of sands used for molds and cores encompasses 2 basic points: emission of hazardous substances during processes of preparing sands, pouring mold with liquid metals (high temperatures), cooling and shaking-out; possibility of washing out hazardous substances from used sands to the environment, during storage or economic use outside foundries. We present the results of research on the emission of BTEX compounds from mould sands with phenolic resins during pouring liquid metal of different temperature (cast iron and Al alloy). The research was conducted according to the original method prepared by the authors, which has been used for years in cooperation with various foundries (Poland, abroad).
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2; 35-38
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elution of mixed moulding sands with the GEOPOL binder and core sands with the phenolic resin
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Dańko, R.
    Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380919.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    phenolic resin
    moulding sand
    core sand
    BTEX
    PAHs
    ochrona środowiska
    żywica fenolowa
    masa formierska
    masa rdzeniowa
    Opis:
    Out of moulding and core 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. Depending on the kind of the applied resin under an influence of a temperature such compounds as for example BTEX group and polycyclic aromatic hydrocarbons (PAHs) can be formed and released. During storing or economic utilization of used sand is possibility of eluting harmful substances into the environment. Therefore at assessing an influence of the used sand on the environment two above elements should be taken into consideration. Only such investigations provide the complete assessment of the given sand harmfulness.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 53-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Natural Phenolic Compound Contained Alkaline Phenolic Foundry Resin and Its Performance Evaluation on Casting
    Autorzy:
    Güvendik, A. E.
    Ay, Kadir
    Powiązania:
    https://bibliotekanauki.pl/articles/1837733.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phenolic resins
    lignosulphonates
    sustainability
    foundry
    Alfanol A 72
    No-bake
    performance evaluation
    żywice fenolowe
    lignosulfoniany
    zrównoważony rozwój
    ocena wydajności
    Opis:
    In foundry, metal casting can be done with various methods. One of the most important methods preferred around the world is sand casting. Ester curable alkaline phenolic resins have produced to make sand molds by No-bake systems. They must have specific properties to make sand casting efficient and reliable. Production of these resins depends on some fossil raw-materials like phenol. To investigate more sustainable and green resin synthesis method, lots experiment have been done by substitution of phenol with renewable alternative phenolic materials like resorcinol, lignosulphonates and tannic acid and its derivatives. Different properties of resins were produced with competitive performance with the market product, ÇKE Alfanol A 72 No-Bake Resin. Without loss of performance, calcium lignosulfonate was used in polymer synthesis at the rate of 15% instead of phenol. On the other hand, the reaction in which lignin and resorcinol were combined instead of phenol by reducing it by 25% gave better results in terms of mechanical and thermal properties. Thermal properties were investigated for resorcinol and lignin modified resins by using TGA-DSC and mechanical performance of cured sand core sample were tested by Simpson Sand Strength Testing Machine as compression strength as N/cm2. After laboratory testing casting performance of new resins are compared with two different companies’ resins in steal casting demo. Experimental results were matched with casting trail and no defect was detected.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 2; 46-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Silicate Modifier on the Emission of Harmful Compounds from Phenolic Resin used in Cold-Box Technology
    Autorzy:
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Drożyński, D.
    Grabowska, B.
    Kaczmarska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380640.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    aromatic hydrocarbons
    phenolic resin
    emission
    Cold-Box technology
    ochrona środowiska
    węglowodory aromatyczne
    żywica fenolowa
    emisja
    technologia Cold-Box
    Opis:
    In many foundries, the requirements placed on castings production have risen mainly over the few years. Further trends in recent years have been the ever increasing level of automation and introduction of new alloys, especially composites. On the other hand, the foundry environment has become increasingly difficult because is used many organic binders. Environmental regulations will be further tightened up. These processes are pursued at national, European and global level. Conformity with emission limits is becoming increasingly difficult. The problem is emission of aromatic hydrocarbons, phenol, odours and other harmful compounds to environment. The main purpose of many companies is reduction of this toxins. The new cold-box systems (based on phenolic resins) try to reduce the emission by introducing into the resin structure silicate modifiers. Research presented of this article evaluate the effectiveness of these methods. The results show comparison of two resins ("without" and "with" silicate modifier) for assessment of emission of harmful aromatic hydrocarbons and phenol.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 151-156
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern Alphaset (APNB) Flexible Formulations-Enhanced Performance
    Autorzy:
    Ghosh, D. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837863.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    make molds and cores
    sand binder
    resin performance
    alkaline phenolic no-bake
    APNB
    wytwarzenie form i rdzeni
    spoiwo piaskowe
    właściwości żywic
    Opis:
    APNB (alkaline phenolic no bake), widely known as Alphaset is one of the major sand binder systems used in foundries to make molds and cores without application of heat or gas. This is a two part system comprising of a phenol-formaldehyde resin in alkaline medium as binder and range of esters of dibasic acids and/or polyhydric alcohols as hardeners. Resin performance varies depending upon formulations. Major variables in formulations are mole ratio of phenol: formaldehyde, total alkali content, ratio of two alkalis (NaOH & KOH) and molecular weight of polymers i.e. chain length. In present work, one mole ratio of phenol & formaldehyde has been chosen to prepare 8 resins [...].
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 18-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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