Effects of reorientation of graphene platelets (GPLs) on young's modulus of polymer nanocomposites under uni-axial stretching

Feng, C, Wang, Y, Kitipornchai, S and Yang, J 2017, 'Effects of reorientation of graphene platelets (GPLs) on young's modulus of polymer nanocomposites under uni-axial stretching', Polymers, vol. 9, no. 10, 532, pp. 1-14.


Document type: Journal Article
Collection: Journal Articles

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Title Effects of reorientation of graphene platelets (GPLs) on young's modulus of polymer nanocomposites under uni-axial stretching
Author(s) Feng, C
Wang, Y
Kitipornchai, S
Yang, J
Year 2017
Journal name Polymers
Volume number 9
Issue number 10
Article Number 532
Start page 1
End page 14
Total pages 14
Publisher M D P I AG
Abstract The orientation of reinforcement fillers in composites plays a vital role in their mechanical properties. This paper employs the Mori-Tanaka micromechanics model, incorporating the effect of stretching-induced reorientation of graphene platelets (GPL), to predict Young's modulus of GPL/polymer nanocomposites. Subjected to uni-axial stretching, dispersion of GPLs is described by an orientation distribution function (ODF) in terms of a stretching strain and two Euler angles. The ODF shows that GPLs tend to realign along the stretching direction. Such realignment is enhanced at a higher Poisson's ratio and under a larger stretching strain. It is found that the out-of-plane Young's modulus of GPL nanofillers has a limited effect on the overall Young's modulus of the composites. With an increase in stretching strain and GPL concentration, Young's modulus increases in the stretching direction while it decreases in the transverse direction. A larger aspect-ratio of GPLs with fewer layers is preferred for enhancing Young's modulus in the stretching direction, but it is unfavorable in the transverse direction. Moreover, Young's moduli in both longitudinal and transverse directions are more sensitive to the reorientation of smaller-sized GPLs with a greater concentration in the composites.
Subject Solid Mechanics
Structural Engineering
Keyword(s) Graphene platelets
Micromechanics
Polymer nanocomposites
Uni-axial stretching
DOI - identifier 10.3390/polym9100532
Copyright notice © 2017 by the authors. Licensee MDPI, Basel, Switzerland. Creative Commons Attribution (CC BY) license (4.0)
ISSN 2073-4360
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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