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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Graphene/polyethylene nanocomposites: Effect of polyethylene functionalization and blending methods
Polymer, Volume 52, No. 8, Year 2011
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Description
Since its recent successful isolation, graphene has attracted an enormous amount of scientific interest due to its exceptional physical properties. Graphene incorporation can improve electrical and mechanical properties of polymers including polyethylene (PE). However, the hydrophobic nature and low polarity of PE have made effective dispersion of nano-fillers difficult without compatibilization. Graphene was derived from graphite oxide (GO) via rapid thermal exfoliation and reduction. This thermally reduced graphene oxide (TRG) was blended via melt and solvent blending with linear low density PE (LLDPE) and its functionalized analogs (amine, nitrile and isocyanate) produced using a ring-opening metathesis polymerization (ROMP) strategy. TRG was well exfoliated in functionalized LLDPE while phase separated morphology was observed in the un-modified LLDPE. Transmission electron micrographs showed that solvent based blending more effectively dispersed these exfoliated carbon sheets than did melt compounding. Tensile modulus was higher for composites with functionalized polyethylenes when solvent blending was used. However, at less than 3 wt.% of TRG, electrical conductivity of the un-modified LLDPE was higher than that of the functionalized ones. This may be due to phase segregation between graphene and PE, and electrical percolation within the continuous filler-rich phase. © 2011 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Kim, Hyunwoo
United States, Minneapolis
University of Minnesota Twin Cities
Kobayashi, Shingo
United States, Minneapolis
University of Minnesota Twin Cities
Abdurrahim, Mohd A.
United Arab Emirates, Abu Dhabi
Khalifa University of Science and Technology
Zhang, Minglun J.
United States, Minneapolis
University of Minnesota Twin Cities
Khusainova, Albina
United States, Minneapolis
University of Minnesota Twin Cities
Hillmyer, Marc A.
United States, Minneapolis
University of Minnesota Twin Cities
Abdala, Ahmed A.
United States, Minneapolis
University of Minnesota Twin Cities
United Arab Emirates, Abu Dhabi
Khalifa University of Science and Technology
Macosko, Christopher
United States, Minneapolis
University of Minnesota Twin Cities
Statistics
Citations: 366
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1016/j.polymer.2011.02.017
ISSN:
00323861
Research Areas
Environmental