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Statements

Subject Item
n2:RIV%2F68407700%3A21230%2F12%3A00200146%21RIV13-MSM-21230___
rdf:type
skos:Concept n13:Vysledek
dcterms:description
In this work the carbon black (CB) was used as the filler in polymer matrix. Primary CB particles (30-50 nm) form larger agglomerates which can build up the continuous electrically conductive path when the concentration of CB reaches the critical value (percolation threshold). The dependence of conductivity on CB concentration shows the sharp rise the composite transforms from insulator to conductor. The aim of this work is microscope (optical and AFM) observation and the measurements of electrical properties of the thin plate (thickness 0,2 mm) composites CB (modified) - polystyrene (PS) prepared from the solution of PS in toluene. The modification of CB was based on ion extraction from CB in distilled water. UV irradiation was added for some samples. The extraction of ions was verified by the measurements of the conductivity of water used and by atomic absorption spectroscopy. Three series of the samples were studied. 1. Composites with dry CB. 2. Composites with CB (DCB-deionised CB) after ion extraction in distilled water. 3. Composites with DCB irradiated by UV lamp during the extraction. The concentration of CB was 1-5 %w in all series. The electrical measurements were carried out in the condenser with micro shift in the frequency region 0,1 - 1000 kHz for temperatures 25 - 80 °C. The separation polyethylene foil was used for higher conductive samples. The impedance - phase measurements are presented directly or in the terms of complex permittivity , where real part is relative permittivity and imaginary one represents losses. The differences in the structure and electrical properties between the samples of composites contained different modified (or non-modified) CB will be discussed in more detailed. In this work the carbon black (CB) was used as the filler in polymer matrix. Primary CB particles (30-50 nm) form larger agglomerates which can build up the continuous electrically conductive path when the concentration of CB reaches the critical value (percolation threshold). The dependence of conductivity on CB concentration shows the sharp rise the composite transforms from insulator to conductor. The aim of this work is microscope (optical and AFM) observation and the measurements of electrical properties of the thin plate (thickness 0,2 mm) composites CB (modified) - polystyrene (PS) prepared from the solution of PS in toluene. The modification of CB was based on ion extraction from CB in distilled water. UV irradiation was added for some samples. The extraction of ions was verified by the measurements of the conductivity of water used and by atomic absorption spectroscopy. Three series of the samples were studied. 1. Composites with dry CB. 2. Composites with CB (DCB-deionised CB) after ion extraction in distilled water. 3. Composites with DCB irradiated by UV lamp during the extraction. The concentration of CB was 1-5 %w in all series. The electrical measurements were carried out in the condenser with micro shift in the frequency region 0,1 - 1000 kHz for temperatures 25 - 80 °C. The separation polyethylene foil was used for higher conductive samples. The impedance - phase measurements are presented directly or in the terms of complex permittivity , where real part is relative permittivity and imaginary one represents losses. The differences in the structure and electrical properties between the samples of composites contained different modified (or non-modified) CB will be discussed in more detailed.
dcterms:title
Effect of Carbon Black Modification on Electrical Properties of Carbon Black - Polymer Composites Effect of Carbon Black Modification on Electrical Properties of Carbon Black - Polymer Composites
skos:prefLabel
Effect of Carbon Black Modification on Electrical Properties of Carbon Black - Polymer Composites Effect of Carbon Black Modification on Electrical Properties of Carbon Black - Polymer Composites
skos:notation
RIV/68407700:21230/12:00200146!RIV13-MSM-21230___
n13:predkladatel
n15:orjk%3A21230
n4:aktivita
n18:Z
n4:aktivity
Z(MSM6840770021)
n4:dodaniDat
n5:2013
n4:domaciTvurceVysledku
n10:5005647 n10:3429938 n10:4718267 n10:4484614
n4:druhVysledku
n12:O
n4:duvernostUdaju
n14:S
n4:entitaPredkladatele
n7:predkladatel
n4:idSjednocenehoVysledku
132955
n4:idVysledku
RIV/68407700:21230/12:00200146
n4:jazykVysledku
n11:eng
n4:klicovaSlova
polymer composites; carbon black; conductivity
n4:klicoveSlovo
n8:carbon%20black n8:polymer%20composites n8:conductivity
n4:kontrolniKodProRIV
[4478666269BC]
n4:obor
n9:JI
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
4
n4:rokUplatneniVysledku
n5:2012
n4:tvurceVysledku
Pilarčíková, Ivana Lipták, Jan Mach, Marek Hejna, Ondřej
n4:zamer
n16:MSM6840770021
n17:organizacniJednotka
21230