6533b827fe1ef96bd1285d9a
RESEARCH PRODUCT
Epoxy Resin/Carbon Black Composites Below the Percolation Threshold
Alesia PaddubskayaJan MacutkevicFederico MicciullaAntonino CataldoVanessa FierroJuras BanysStefano BellucciSergey A. MaksimenkoPolina KuzhirAlain CelzardE. Stefanuttisubject
Materials scienceBiomedical EngineeringBioengineering02 engineering and technologyDielectric01 natural sciences[SPI.MAT]Engineering Sciences [physics]/MaterialsElectrical resistivity and conductivity0103 physical sciences[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]General Materials ScienceComposite materialSettore CHIM/02 - Chimica Fisica010302 applied physicschemistry.chemical_classification[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]Percolation thresholdGeneral ChemistryCarbon blackPolymerEpoxy[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics[SPI.ELEC]Engineering Sciences [physics]/ElectromagnetismSettore ING-IND/22 - Scienza E Tecnologia Dei Materiali[CHIM.POLY]Chemical Sciences/PolymerschemistryNanocomposite Carbon black Percolation threshold electrical propertiesvisual_artvisual_art.visual_art_mediumAntistatic agent[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci][SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]0210 nano-technologyGlass transitiondescription
International audience; A set of epoxy resin composites filled with 0.25-2.0 wt.% of commercially available ENSACO carbon black (CB) of high and low surface area (CBH and CBL respectively) has been produced. The results of broadband dielectric spectroscopy of manufactured CB/epoxy below the percolation threshold in broad temperature (200 K to 450 K) and frequency (20 Hz to 1 MHz) ranges are reported. The dielectric properties of composites below the percolation threshold are mostly determined by alpha relaxation in pure polymer matrix. The glass transition temperature for CB/epoxy decreases in comparison with neat epoxy resin due to the extra free volume at the polymer-filler interface. At room temperature, the dielectric permittivity is higher for epoxy loaded with CBH additives. In contrast, at high temperature, the electrical conductivity was found to be higher for composites with CBL embedded. The established influence of the CB surface area on the broadband dielectric characteristics can be exploited for the production of effective low-cost antistatic paints and coatings working at different temperatures.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-08-01 |