Enhanced thermal stability and lifetime of epoxy nanocomposites using covalently functionalized clay: Experimental and modelling

Zabihi, Omid, Khayyam, Hamid, Fox, Bronwyn L. and Naebe, Minoo 2015, Enhanced thermal stability and lifetime of epoxy nanocomposites using covalently functionalized clay: Experimental and modelling, New journal of chemistry, vol. 39, no. 3, pp. 2269-2278, doi: 10.1039/c4nj01768d.

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Title Enhanced thermal stability and lifetime of epoxy nanocomposites using covalently functionalized clay: Experimental and modelling
Author(s) Zabihi, OmidORCID iD for Zabihi, Omid orcid.org/0000-0001-8065-2671
Khayyam, Hamid
Fox, Bronwyn L.
Naebe, MinooORCID iD for Naebe, Minoo orcid.org/0000-0002-0607-6327
Journal name New journal of chemistry
Volume number 39
Issue number 3
Start page 2269
End page 2278
Total pages 10
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2015-03-01
ISSN 1144-0546
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Summary The present work aims at finding a relationship between kinetic models of thermal degradation process with the physiochemical structure of epoxy-clay nanocomposites in order to understand its service temperature. In this work, two different types of modified clays, including clay modified with (3-aminopropyl)triethoxysilane (APTES) and a commercial organoclay, were covalently and non-covalently incorporated into epoxy matrix, respectively. The effect of different concentrations of silanized clay on thermal behaviour of epoxy nanocomposites were first investigated in order to choose the optimum clay concentration. Afterwards, thermal characteristics of the degradation process of epoxy nanocomposites were obtained by TGA analysis and the results were employed to determine the kinetic parameters using model-free isoconversional and model-fitting methods. The obtained kinetic parameters were used to model the entire degradation process. The results showed that the incorporation of the different modified clay into epoxy matrix change the mathematical model of the degradation process, associating with different orientations of clay into epoxy matrix confirming by XRD results. The obtained models for each epoxy nanocomposite systems were used to investigate the dependence of degradation rate and degradation time on temperature and conversion degree. Our results provide an explanation as to how the life time of epoxy and its nanocomposites change in a wide range of operating temperatures as a result of their structural changes.
Language eng
DOI 10.1039/c4nj01768d
Field of Research 030304 Physical Chemistry of Materials
091209 Polymers and Plastics
091307 Numerical Modelling and Mechanical Characterisation
Socio Economic Objective 860604 Organic Industrial Chemicals (excl. Resins
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30074938

Document type: Journal Article
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