NAVRACHANA UNIVERSITY

Polyethersulfone-expanded graphite nanocomposites: Charge transport and impedance characteristics

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dc.contributor.author B. T. S, Ramanujam
dc.contributor.author Mahale, Rajashree Y.
dc.contributor.author S., Radhakrishnan
dc.date.accessioned 2016-03-16T09:19:23Z
dc.date.available 2016-03-16T09:19:23Z
dc.date.issued 2010
dc.identifier.issn 0266-3538
dc.identifier.uri http://27.109.7.66:8080/xmlui/handle/123456789/215
dc.description Composites Science and Technology 70 (2010) 2111–2116 en_US
dc.description.abstract Polyethersulfone (PES)-expanded graphite nanocomposites have been prepared by solution blending route after sonicating expanded graphite in dichloromethane. It has been observed that ultrasonication results in nanosheets formation leading to a low percolation threshold of 3 wt.%. At 5 wt.% filler loading the conductivity is of the order of 10 2 S/cm. Hopping type of charge transport occurs at 3.2 wt.% expanded graphite in PES below which capacitive effects couple. The effective dielectric constant at low frequency increases with filler concentration. Impedance measurement has been carried out to eval- uate interfacial capacitance which, for 3.2 wt.% expanded graphite addition in PES, increases to 110 pF from 32 pF for 1 wt.% expanded graphite in the polymer. DSC analysis shows an increment of 12 C in the Tg of PES with 3 wt.% expanded graphite suggesting interaction between the polymer and filler. en_US
dc.language.iso en en_US
dc.publisher Elsevier Ltd. en_US
dc.subject Polymers en_US
dc.subject Electrical properties en_US
dc.subject Modeling en_US
dc.subject Differential scanning calorimetry (DSC) en_US
dc.subject Scanning/transmission electron microscopy (STEM) en_US
dc.title Polyethersulfone-expanded graphite nanocomposites: Charge transport and impedance characteristics en_US
dc.type Article en_US


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