Temat: carboxymethyl starch sodium - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of Selected Properties of Green Sands with Modified Starch-based Additives
Autorzy:: Kaczmarska, K.
Grabowska, B.
Drożyński, D.
Powiązania:: https://bibliotekanauki.pl/articles/382341.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative moulding material
green sand system
moulding sand
carboxymethyl starch sodium
innowacyjny materiał odlewniczy
masa formierska
skrobia karboksymetylowana
Opis:: The aim of this study was the preliminary assessment the effectiveness of application of sodium carboxymethyl starch (CMS-Na) as an additives to green sands with bentonite. Two modified starches CMS-Na having a low and a high degree of substitution (DS), 0.2 and 0.9 respectively, were chosen for preparing moulding sands. Influence of modified starch with different DS on the properties of the green sand was determined based on the results of the determination: apparent density, permeability, free flowability, friability and compressive strength, tensile and shear green sands with the addition of starch. The properties of the starch without starch-based additives were compared with the properties of green sand containing in the composition of CMS-Na with different degree of substitution.
Źródło:: Archives of Foundry Engineering; 2015, 15, 3 spec.; 127-131
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Studies on the Gases Emission under High Temperature Condition from Moulding Sands Bonded by Modified Starch CMS-Na
Autorzy:: Kaczmarska, K.
Bobrowski, A.
Żymankowska-Kumon, S.
Grabowska, B.
Powiązania:: https://bibliotekanauki.pl/articles/380949.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative moulding material
sodium carboxymethyl starch
gas emission
BTEX
materiały formierskie
skrobia modyfikowana
emisja gazów
Opis:: Emission of gases under high temperature after pouring molten metal into moulds, which contain the organic binder or other additives (solvents or curing agent), may be an important factor influencing both on the quality of the produced castings, and on the state of environment. Therefore, a comprehensive studies of the emitted gases would allow to determine restrictions on the use of the moulding sands in foundry technologies, eg. the probability of occurrence of casting defects, and identify the gaseous pollutants emitted to the environment. The aim of the research presented in this paper was to determine the amount of gases that are released at high temperatures from moulding sands bonded by biopolymer binder and the quantitative assessment of the emitted pollutants with particular emphasis on chemical compounds: benzene, toluene, ethylbenzene and xylenes (BTEX). The water-soluble modified potato starch as a sodium carboxymethyl starch with low (CMS-NaL) or high (CMS-NaH) degree of substitution was a binder in the tested moulding sands. A tests of gases emission level were conducted according to the procedure developed at the Faculty of Foundry Engineering (AGH University of Science and Technology) involving gas chromatography method (GC). The obtained results of the determination of amount of BTEX compounds generated during the decomposition process of starch binders showed lower emission of aromatic hydrocarbons in comparison with binder based on resin Kaltharz U404 with the acidic curing agent commonly used in the foundries.
Źródło:: Archives of Foundry Engineering; 2017, 17, 1; 79-82
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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