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| rdf:type
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| 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. (en)
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| 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 (en)
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| 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 (en)
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| skos:notation
| - RIV/68407700:21230/12:00200146!RIV13-MSM-21230___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/68407700:21230/12:00200146
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - polymer composites; carbon black; conductivity (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Pilarčíková, Ivana
- Lipták, Jan
- Hejna, Ondřej
- Mach, Marek
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| http://linked.open...n/vavai/riv/zamer
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| http://localhost/t...ganizacniJednotka
| |
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