Study of Thermal Degradation of Starch-Based Binder by TG-DTG-DSC, Py-GC/MS and DRIFTS

This paper focuses on the thermal behavior of the starch-based binder (Albertine F/1 by Hüttenes-Albertus) used in foundry technology of molding sand. The analysis of the course of decomposition of the starch material under controlled heating in the temperature range of 25-1100°C was conducted. Ther...

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Bibliographic Details
Published inArchives of foundry engineering Vol. 19; no. 4; p. 21
Main Authors Kaczmarska, K, Żymankowska-Kumon, S, Grabowska, B, Bobrowski, A, Cukrowicz, S
Format Journal Article
LanguageEnglish
Published Katowice Polish Academy of Sciences 01.01.2019
Subjects
Aromatic hydrocarbons
Chromatography
Decomposition
Diffuse reflectance spectroscopy
Foundry sands
Gas chromatography
Heat conductivity
Mass spectrometry
Oxidation
Pyrolysis
Scientific imaging
Thermal analysis
Thermal degradation
Thermodynamic properties
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Summary:This paper focuses on the thermal behavior of the starch-based binder (Albertine F/1 by Hüttenes-Albertus) used in foundry technology of molding sand. The analysis of the course of decomposition of the starch material under controlled heating in the temperature range of 25-1100°C was conducted. Thermal analysis methods (TG-DTG-DSC), pyrolysis gas chromatography coupled with mass spectrometry (Py-GC/MS) and diffuse reflectance spectroscopy (DRIFT) were used. The application of various methods of thermal analysis and spectroscopic methods allows to verify the binder decomposition process in relation to conditions in the form in both inert and oxidizing atmosphere. It was confirmed that the binder decomposition is a complex multistage process. The identification of CO2 formation at set temperature range indicated the progressive process of decomposition. A qualitative evaluation of pyrolysis products was carried out and the course of structural changes occurring in the presence of oxygen was determined based on thermo-analytical investigations the temperature of the beginning of binder degradation in set condition was determined. It was noticed that, significant intensification of Albertine F/1 sample decomposition with formation of more degradation products took place at temperatures above 550ºC. Aromatic hydrocarbons were identified at 1100ºC.
ISSN:1897-3310
2299-2944
DOI:10.24425/afe.2019.129624