Dielectric properties of a novel high absorbing onion-like-carbon based polymer composite
| Autor: | Alexandre Mayer, Olga Shenderova, Sergey I. Moseenkov, Alesia Paddubskaya, Ph. Lambin, Vladimir L. Kuznetsov, Gregory Ya. Slepyan, Gintaras Valušis, J. Banys, Sergey A. Maksimenko, Polina Kuzhir, Jan Macutkevic, Dalius Seliuta, Dzmitry Bychanok |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Permittivity Materials science Mechanical Engineering Composite number 02 engineering and technology General Chemistry Polymer Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials Dielectric spectroscopy chemistry Materials Chemistry Thermal stability Electrical and Electronic Engineering Composite material 0210 nano-technology Absorption (electromagnetic radiation) Glass transition |
| Zdroj: | Diamond and Related Materials. 19:91-99 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/j.diamond.2009.11.011 |
| Popis: | A novel lightweight onion-like carbon (OLC) based Poly(methyl metacrylate) (PMMA) composite with high electromagnetic (EM) absorption capability determined earlier in microwave range is studied in low frequencies from 20 Hz to 1 MHz by dielectric spectroscopy. The investigation of dielectric properties of PMMA films with incorporated OLC in small concentration (0.5–2 wt.%) have been carried out by varying the temperature between 240 and 520 K. The temperature behavior of the complex permittivity at a given frequency is found to be strongly dependent on the OLC concentration. The experimental data are in quantitative agreement with the results of modified effective medium calculations of OLC-based polymer film's permittivity. Both the experimental observations and theoretical simulation demonstrate that small additions of onion-like carbon particles to a polymer matrix can noticeably modify the composite response to low-frequency EM radiation as well as improve its thermal stability (increased glass transition and melting temperatures, correspondingly). |
| Databáze: | OpenAIRE |
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