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E. Horváth Institute of Environmental Engineering, University of Pannonia, H-8200, Veszprém, P.O. Box 158, Hungary

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J. Kristóf Institute of Environmental Engineering, University of Pannonia, H-8200, Veszprém, P.O. Box 158, Hungary

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R. Kurdi Institute of Environmental Engineering, University of Pannonia, H-8200, Veszprém, P.O. Box 158, Hungary

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É. Makó Institute of Materials Engineering, University of Pannonia, H-8200, Veszprém, P.O. Box 158, Hungary

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V. Khunová Institute of Polymer Materials, The Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia

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Abstract

Intercalation of a kaolinite-containing halloysite from Biela Hora (Slovakia) with urea was investigated by simultaneous TG–DTA, XRD, FTIR (DRIFT), and Raman spectroscopy. The process of intercalation and thermal deintercalation was followed for the as-prepared and the washed (with isopropanol) samples. The proposed structural model was supported by molecular mechanical calculations. Incorporation of the intercalate (in 5 wt%) in molten polypropylene at 200 °C resulted in the complete delamination of the mineral. It is supposed that gas formation as a result of urea decomposition between the layers prevents reorientation and restructuring of the layers.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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