Modelling stiffness of polymer/clay nanocomposites

Hbaieb, K. and Wang, Q. X. ORCID: https://orcid.org/0000-0003-0626-1538 and Chia, Y. H. J. and Cotterell, B. (2007) Modelling stiffness of polymer/clay nanocomposites. Polymer, 48 (3). pp. 901-909. ISSN 0032-3861


Abstract

Aligned nanoclay particles can be distributed randomly in a polymer matrix even at high volume fractions, but randomly oriented particles cannot be randomly distributed at high volume fractions. Instead a nanocomposite where there are clusters of nearly aligned particles is obtained. The clusters of nearly aligned particles form an effective particle with lower aspect ratio. This phenomenon which produces a nanocomposite of less stiffness than might have been expected has implications for the processing of nanoclay polymer composites.

It is shown by comparing two-dimensional to three-dimensional finite element studies that the two-dimensional model, often used because it is simpler, does not accurately predict the stiffness. The Mori–Tanaka model is shown to give a reasonably accurate prediction of the stiffness of clay nanocomposites whose volume fraction is less than about 5% for aligned particles but underestimates the stiffness at higher volume fractions. On the other hand for randomly oriented particles the Mori–Tanaka model overestimates the stiffness of clay nanocomposites.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 13 Apr 2022 05:02
Last Modified: 13 Apr 2022 05:02
Uncontrolled Keywords: Finite element; Mori–Tanaka; Stiffness
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401706 Numerical modelling and mechanical characterisation
40 ENGINEERING > 4018 Nanotechnology > 401807 Nanomaterials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Identification Number or DOI: https://doi.org/10.1016/j.polymer.2006.11.062
URI: http://eprints.usq.edu.au/id/eprint/47456

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