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 |