Thermal and dielectric properties of carbon nanotubes/graphite/polyester ternary composites
| Autor: | S. Soreto Teixeira, R. Belhimria, L. C. Costa, M. El Hasnaoui, A Anson-Casaos, Z. Samir, J M Gonzalez-Dominguez, S. Boukheir, Mohammed Essaid Achour |
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| Přispěvatelé: | Fundação para a Ciência e a Tecnologia (Portugal), Ministerio de Economía y Competitividad (España), Diputación General de Aragón, Ansón Casaos, Alejandro [0000-0002-3134-8566], González Domínguez, José Miguel [0000-0002-0701-7695], El Hasnaoui, M. [0000-0003-1699-9528], Ansón Casaos, Alejandro, González Domínguez, José Miguel, El Hasnaoui, M. |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Thermal analyses Carbon nanotubes Polyester chemistry.chemical_element 02 engineering and technology Carbon nanotube Dielectric Electrical modulus 01 natural sciences law.invention law 0103 physical sciences Thermal Materials Chemistry Graphite Composite material 010302 applied physics Mechanical Engineering 021001 nanoscience & nanotechnology Cole-Davidson model chemistry Mechanics of Materials Ceramics and Composites 0210 nano-technology Ternary operation Carbon Polyester matrix |
| Zdroj: | Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname |
| DOI: | 10.13039/501100001871 |
| Popis: | Reuse is restricted to non-commercial and no derivative uses. Binary and ternary composites were synthesized using a polyester matrix reinforced by two types of carbon inclusions, namely, carbon nanotubes (CNT) and graphite (Gt) (CNT/Gt/Polyester). Thermal analyses were performed, using thermogravimetry and differential scanning calorimetry, which allowed us to observe significant changes in glass transition temperatures and degradation temperatures of the composites. Dielectric measurements were performed in a frequency range from 100 Hz to 1 MHz and temperature from –33 to 107°C. The dielectric permittivity values of the CNT/Gt/Polyester ternary composites, compared to the Gt/Polyester binary composites, indicate that the addition of CNT particles to the Gt/Polyester binary system significantly improved the dielectric permittivity, due to the enhanced interfacial polarization of the host matrix, while the frequency dependence of the electrical modulus spectra revealed a Maxwell–Wagner–Sillars dielectric relaxation process that was found to follow the Cole–Davidson approach. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Project I3N, UIDB/50025/2020 and UIDP/50025/2020, FCT/MEC and the financial support from the Diputación General de Aragón under project T03_20R (Grupo Reconocido). |
| Databáze: | OpenAIRE |
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