Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 108: Issue 2
Estimation of the storage life of dimethylol urea using non-isothermal accelerated testing
Authors:
T. Fukumoto School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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P. S. Thomas School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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B. H. Stuart School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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P. Simon Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovak Republic

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G. Adam School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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R. Shimmon School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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J.-P. Guerbois School of Chemistry and Forensic Science, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

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Pages:
439–443
Online Publication Date:
12 Oct 2011
Publication Date:
01 May 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-1931-9
Keywords:
Dimethylol urea; Polycondensation; Induction period; Non-isothermal kinetics; TG
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Abstract

The mechanism and stability of dimethylol urea (DMU) to polycondensation were investigated using thermogravimetric analysis coupled with mass spectroscopy (TG-MS) for evolved gas analysis and a non-isothermal model-free induction period kinetic analysis using three temperature functions; the Arrhenius function and two non-Arrhenian functions. The polycondensation was observed to occur through a two-step process of condensation followed by elimination of formaldehyde during structural rearrangement as has been reported in the literature. The rate equations for each temperature function were evaluated and extrapolated to room (23 °C) and refrigerator (4 °C) temperature to estimate the length of the induction period for the onset of polycondensation for storage life prediction. Based on experience, estimates of the length of the induction periods and, hence, storage life, were most realistically predicted by the non-Arrhenian temperature functions.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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