Electrical and optical percolations in PMMA/GNP composite films

Effects of graphene nanoplatelet (GNP) addition on the electrical conductivity and optical absorbance of poly(methyl methacrylate)/graphene nanoplatelet (PMMA/GNP) composite films were studied. Optical absorbance and two point probe resistivity techniques were used to determine the variations of the...

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Bibliographic Details
Published inPhase transitions Vol. 91; no. 5; pp. 546 - 557
Main Authors Arda, Ertan, Mergen, Ömer Bahadır, Pekcan, Önder
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Ltd 04.05.2018
Subjects
Absorbance
Chemical industry
Composite materials
Conductivity
Electrical properties
Electrical resistivity
Graphene
Optical properties
Percolation
Polymethyl methacrylate
Static electricity
Surface resistivity
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Summary:Effects of graphene nanoplatelet (GNP) addition on the electrical conductivity and optical absorbance of poly(methyl methacrylate)/graphene nanoplatelet (PMMA/GNP) composite films were studied. Optical absorbance and two point probe resistivity techniques were used to determine the variations of the optical and electrical properties of the composites, respectively. Absorbance intensity, A, and surface resistivity, Rs, of the composite films were monitored as a function of GNP mass fraction (M) at room temperature. Absorbance intensity values of the composites were increased and surface resistivity values were decreased by increasing the content of GNP in the composite. Electrical and optical percolation thresholds of composite films were determined as Mσ = 27.5 wt.% and Mop = 26.6 wt.%, respectively. The conductivity and the optical results were attributed to the classical and site percolation theories, respectively. Optical ([beta]op) and electrical ([beta]σ) critical exponents were calculated as 0.40 and 1.71, respectively.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2018.1432053