Abstract
This paper presents results of thermoanalytical and structural research on phenolic binder used in foundry for the preparation of moulding sand. The binder has been prepared based on resole type phenolic resin with the addition of ester hardener. The aim of the study was to determine the structural changes taking place in the phenolic binder under the influence of temperature. Results show that in the investigated range of temperatures, phenolic binder exhibits three exothermic thermal effects accompanying the decomposition process. The test results using the Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) technique show that the addition of a hardener stabilizes the binder structure within methylene bridges. The reduction in the reaction rate observed in the DTA curve at about 330 °C can be associated with the formation of gaseous products by decomposition of the binder or, as suggested by the literature data, the formation of triple bonds and CN-HCN groups.
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Artur Bobrowski Male, bom in 1979 in Poland, Ph. D. His research interests mainly focus on the development of new environmental-friendly materials and technologies for foundry industry, assessment of the harmfulness of materials used in casting process, and use of spectroscopic methods (FTIR) for materials testing. He is the author or co-author of over 150 publications, 2 patents and 2 patent applications. Since 2016, he has been the co-editor of the Journal of Casting and Materials Engineering.
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Bobrowski, A., Drożyński, D., Grabowska, B. et al. Studies on thermal decomposition of phenol binder using TG/DTG/DTA and FTIR-DRIFTS techniques in temperature range 20–500 °C. China Foundry 15, 145–151 (2018). https://doi.org/10.1007/s41230-018-7035-4
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DOI: https://doi.org/10.1007/s41230-018-7035-4