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Sub-surface and bulk creep behaviour of polyurethane/clay nanocomposites
journal contribution
posted on 2015-06-23, 13:56 authored by Jie Jin, Kamal Yusoh, H.X. Zhang, Mo SongA series of exfoliated and intercalated polyurethane organoclay nanocomposites were
prepared by in situ polymerization of polyol/organoclay mixture, chain extender and
diisocyanate. The creep behaviour of subsurface and bulk of the polyurethane
coatings was investigated by nanoindentation technique and uniaxial conventional
creep testing method, respectively. The results showed that the creep resistance of the
nanocomposites was significantly improved by incorporation of organoclay. The
enhancement of creep resistance was dependent on clay content as well as organoclay
structure (exfoliation or intercalation) in the polymer matrix. With 1wt% organoclay, the creep resistance increased by about 50% for the intercalated organoclay and 6%
for the exfoliated organoclay systems, respectively, compared to the pristine
polyurethane. Viscoelastic model was employed to investigate the effect of
organoclay loadings on the creep performance of the polyurethane. Results showed
the model was in good agreement with the experimental data. Incorporation of clay
leads to an increase in elastic deformation especially in exfoliated polyurethane
nanocomposites and induces a higher initial displacement at the early stage of creep.
Funding
We thank EPSRC (UK) for providing funding [grant number EP/G042756] for this work.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
Journal of Nanoscience and NanotechnologyCitation
JIN, J. ... et al, 2016. Sub-surface and bulk creep behaviour of polyurethane/clay nanocomposites. Journal of Nanoscience and Nanotechnology, 16(3), pp.2576-2581.Publisher
© American Scientific PublishersVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2016Notes
This article is closed access.ISSN
1533-4899Publisher version
Language
- en