Effect of modified graphene and microwave irradiation on the mechanical and thermal properties of poly(styrene-co-methyl methacrylate)/graphene nanocomposites

Handle URI:
http://hdl.handle.net/10754/563690
Title:
Effect of modified graphene and microwave irradiation on the mechanical and thermal properties of poly(styrene-co-methyl methacrylate)/graphene nanocomposites
Authors:
Zubair, Mukarram; Jose, Jobin Vinodh; Emwas, Abdul-Hamid M.; Al-Harthi, Mamdouh Ahmed
Abstract:
The effect of modified graphene (MG) and microwave irradiation on the interaction between graphene (G) and poly(styrene-co-methyl meth acrylate) [P(S-co-MMA)] polymer matrix has been studied in this article. Modification of graphene was performed using nitric acid. P(S-co-MMA) polymer was blended via melt blending with pristine and MG. The resultant nanocomposites were irradiated under microwave at three different time intervals (5, 10, and 20 min). Compared to pristine graphene, MG showed improved interaction with P(S-co-MMA) polymer (P) after melt mixing and microwave irradiation. The mechanism of improved dispersion and interaction of modified graphene with P(S-co-MMA) polymer matrix during melt mixing and microwave irradiation is due to the presence of oxygen functionalities on the surface of MG as confirmed from Fourier transform infrared spectroscopy. The formation of defects on modified graphene and free radicals on P(S-co-MMA) polymer chains after irradiation as explained by Raman spectroscopy and X-Ray diffraction studies. The nanocomposites with 0.1 wt% G and MG have shown a 26% and 38% increase in storage modulus. After irradiation (10 min), the storage modulus further improved to 11.9% and 27.6% of nanocomposites. The glass transition temperature of nanocomposites also improved considerably after melt mixing and microwave irradiation (but only for polymer MG nanocomposite). However, at higher irradiation time (20 min), degradation of polymer nanocomposites occurred. State of creation of crosslink network after 10 min of irradiation and degradation after 20 min of irradiation of nanocomposites was confirmed from SEM studies. Copyright © 2014 John Wiley & Sons, Ltd.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab
Publisher:
Wiley-Blackwell
Journal:
Surface and Interface Analysis
Issue Date:
4-Aug-2014
DOI:
10.1002/sia.5630
Type:
Article
ISSN:
01422421
Sponsors:
Thanks to Center of Research Excellence in Nanotechnology (CENT) for the support in this study.
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab

Full metadata record

DC FieldValue Language
dc.contributor.authorZubair, Mukarramen
dc.contributor.authorJose, Jobin Vinodhen
dc.contributor.authorEmwas, Abdul-Hamid M.en
dc.contributor.authorAl-Harthi, Mamdouh Ahmeden
dc.date.accessioned2015-08-03T12:06:29Zen
dc.date.available2015-08-03T12:06:29Zen
dc.date.issued2014-08-04en
dc.identifier.issn01422421en
dc.identifier.doi10.1002/sia.5630en
dc.identifier.urihttp://hdl.handle.net/10754/563690en
dc.description.abstractThe effect of modified graphene (MG) and microwave irradiation on the interaction between graphene (G) and poly(styrene-co-methyl meth acrylate) [P(S-co-MMA)] polymer matrix has been studied in this article. Modification of graphene was performed using nitric acid. P(S-co-MMA) polymer was blended via melt blending with pristine and MG. The resultant nanocomposites were irradiated under microwave at three different time intervals (5, 10, and 20 min). Compared to pristine graphene, MG showed improved interaction with P(S-co-MMA) polymer (P) after melt mixing and microwave irradiation. The mechanism of improved dispersion and interaction of modified graphene with P(S-co-MMA) polymer matrix during melt mixing and microwave irradiation is due to the presence of oxygen functionalities on the surface of MG as confirmed from Fourier transform infrared spectroscopy. The formation of defects on modified graphene and free radicals on P(S-co-MMA) polymer chains after irradiation as explained by Raman spectroscopy and X-Ray diffraction studies. The nanocomposites with 0.1 wt% G and MG have shown a 26% and 38% increase in storage modulus. After irradiation (10 min), the storage modulus further improved to 11.9% and 27.6% of nanocomposites. The glass transition temperature of nanocomposites also improved considerably after melt mixing and microwave irradiation (but only for polymer MG nanocomposite). However, at higher irradiation time (20 min), degradation of polymer nanocomposites occurred. State of creation of crosslink network after 10 min of irradiation and degradation after 20 min of irradiation of nanocomposites was confirmed from SEM studies. Copyright © 2014 John Wiley & Sons, Ltd.en
dc.description.sponsorshipThanks to Center of Research Excellence in Nanotechnology (CENT) for the support in this study.en
dc.publisherWiley-Blackwellen
dc.subjectcopolymeren
dc.subjectmethyl methacrylateen
dc.subjectmicrowave irradiationen
dc.subjectmodified grapheneen
dc.subjectstyreneen
dc.titleEffect of modified graphene and microwave irradiation on the mechanical and thermal properties of poly(styrene-co-methyl methacrylate)/graphene nanocompositesen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.identifier.journalSurface and Interface Analysisen
dc.contributor.institutionDepartment of Chemical Engineering, King Fahd University of Petroleum and Minerals, 31261 Dhahran, Saudi Arabiaen
dc.contributor.institutionCenter of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, 31261 Dhahran, Saudi Arabiaen
kaust.authorEmwas, Abdul-Hamid M.en
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