Microwave Properties of GNP-Polymer Composites with a Segregated Conductive Network
| Authors | O.A. Syvolozhskyi1, O.A. Lazarenko1, L.Yu. Matzui1 , L.L. Vovchenko1 , V.V. Oliynyk1 , V.V. Zagorodnii1 , Y.P Mamunia2 |
| Affiliations |
1Faculty of Physics, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska St., 01601 Kyiv, Ukraine 2Institute of High-Molecules Compounds Chemistry of National Academy of Science of Ukraine, 48, Kharkovskoe Shosse, 02160 Kyiv, Ukraine |
| Е-mail | mail.olexiy@gmail.com |
| Issue | Volume 14, Year 2022, Number 5 |
| Dates | Received 18 July 2022; revised manuscript received 20 October 2022; published online 28 October 2022 |
| Citation | O.A. Syvolozhskyi, O.A. Lazarenko, L.Yu. Matzui, et al., J. Nano- Electron. Phys. 14 No 5, 05002 (2022) |
| DOI | https://doi.org/10.21272/jnep.14(5).05002 |
| PACS Number(s) | 78.70.Gq |
| Keywords | Segregated structure, Microwave properties, Polymer nanocomposites, Dielectric permittivity. |
| Annotation |
This work presents the results of investigation of the electrodynamic and shielding characteristics in the range of 40-60 GHz of polymer composites with graphite nanoplatelets and two different types of polymers. Ultra-high molecular weight polyethylene and Nylon 12 polyamide were used as a polymer matrix. It was found that the uniformity of the polymer particle size distribution in a composite strongly affects the value of the percolation threshold of the electrical conductivity of composites, namely, the lower the particle size dispersion, the lower the percolation threshold. The dielectric permittivity dependences on the filler concentration of investigated composites do not have percolation behavior and are almost independent of the electromagnetic radiation (EMR) frequency and the radius of polymer globules. At the same time, the uniformity of the particle size distribution has a positive effect on the increase in the absorption of electromagnetic waves in the material, which is confirmed by higher absorption characteristics in nylon-based composites compared to composites with polyethylene. |
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