Microwave Properties of Composite Films Based on Polyvinyl Chloride and Brominated Activated Carbon

Author:

Grishchenko Liudmyla M.123ORCID,Zhytnyk Dmytro O.1ORCID,Matushko Igor P.4ORCID,Diyuk Vitaliy E.3ORCID,Noskov Yuriy V.5ORCID,Malyshev Volodymyr Yu.6,Moiseienko Vladyslav A.27ORCID,Boldyrieva Olga Yu.3ORCID,Lisnyak Vladyslav V.23ORCID

Affiliation:

1. Faculty of Radiophysics, Electronics and Computer Systems Taras Shevchenko National University of Kyiv 4g, Hlushkova Avenue 03022 Kyiv Ukraine

2. Institute of Macromolecular Chemistry The National Academy of Sciences of Ukraine 48, Kharkivs'ke Shose 02160 Kyiv Ukraine

3. Chemical Faculty Taras Shevchenko National University of Kyiv 64 Volodymyrska Str. 01033 Kyiv Ukraine

4. Physical Faculty Taras Shevchenko National University of Kyiv 4, Hlushkova Avenue 03127 Kyiv Ukraine

5. V. Kukhar Institute of Bioorganic Chemistry and Petrochemistry The National Academy of Sciences of Ukraine 50, Kharkivske Shose 02160 Kyiv Ukraine

6. Institute of High Technologies Taras Shevchenko National University of Kyiv 4 g, Hlushkova Avenue 03022 Kyiv Ukraine

7. Independent Research & Development Laboratory “200k Electronics” Office 101, 52/17, Volodymyrska Str. 01030 Kyiv Ukraine

Abstract

AbstractBrominated activated carbon (AC/Br2) powder was used as a filler in poly(vinyl chloride) (PVC) to prepare PVC‐based composite films by hot pressing. The AC/Br2 filler was obtained by liquid phase bromination and contained both oxygen and bromine. In comparison with the unmodified AC, the AC/Br2 was subjected to thermogravimetric analysis in air and argon and temperature‐programmed desorption mass spectrometry in vacuum, which identified carbon‐oxygen and bromine groups and showed the comparable thermal stability of AC/Br2 and AC. XPS shows the predominance of phenolic groups among the carbon‐oxygen groups. Scanning electron microscopy and transmission electron microscopy showed preserved morphology and microstructure, while N2 adsorption showed a microporosity decrease after bromination. FTIR analysis suggested non‐chemical interactions between PVC and AC/Br2. As the AC/Br2 content in the PVC‐based composite films increases from 0.2 to 30 wt %, the electromagnetic radiation (EMR) reflection at Ka‐band microwave frequencies increases. To reduce the EMR reflection, the proposed composite films should contain a maximum of 0.2 wt % AC/Br2. The results indicate that the microwave properties of PVC‐based composite films can be tuned by adjusting the AC/Br2 content.

Funder

Ministry of Education and Science of Ukraine

Publisher

Wiley

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