Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/82820
Título: | Electrical properties of melt-mixed polypropylene and as-grown carbon nanofiber composites: analysis of their interphase via the AC conductivity modeling |
Autor(es): | Paleo, Antonio J. Aribou, Najoia Nioua, Yassine Samir, Zineb Fernandes, Lisete Moreira, J. Agostinho Achour, Mohammed E. |
Palavras-chave: | Carbon nanofibers Polypropylene Interphase Polymer composites Generalized effective medium model |
Data: | 2022 |
Editora: | SAGE Publications |
Revista: | Journal of Composite Materials |
Citação: | Paleo AJ, Aribou N, Nioua Y, et al. Electrical properties of melt-mixed polypropylene and as-grown carbon nanofiber composites: Analysis of their interphase via the AC conductivity modeling. Journal of Composite Materials. 2022;56(12):1879-1889. doi:10.1177/00219983221084407 |
Resumo(s): | The morphology, crystallinity, and electrical conductivity (σ′ and σ″) as a function of frequency of polypropylene (PP) melt-extruded with different amounts of as-grown carbon nanofibers (CNFs) from 0 to 1.4 vol. % are examined. The PP/CNF composites present CNF aggregates randomly distributed within the PP and an insulator–conductor transition at CNF contents near 0.9 vol. %. The degree of crystallinity of PP/CNF composites with loadings of 1.4 vol. % increases ∼15% with respect to the neat PP (∼34%), with σ´ ∼ 8.6 × 10−5 S m−1 (σ″ ∼ 8.3 × 10−4 S m−1) at 2 MHz. In addition, the values of the electrical conductivity σint´ ∼2.9 × 10−6 S m−1 (σint″∼3.7 × 10−4 S m−1) at 2 MHz, as a result of the interphase (ϕint ∼0.05 vol. %) of the 1.4 vol. % PP/CNF composites, are estimated by the use of a modified generalized effective medium model (GEM). The analysis gathered in here indicates that the interphase between the polymer and the conducting particle may have a quantifiable effect on the electrical properties of carbon-based polymer composites, and this fact should not be neglected in the production of conducting polymer composites (CPCs) with enhanced electrical properties. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/82820 |
DOI: | 10.1177/00219983221084407 |
ISSN: | 0021-9983 |
e-ISSN: | 1530-793X |
Versão da editora: | https://journals.sagepub.com/doi/10.1177/00219983221084407 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | DET/2C2T - Artigos em revistas internacionais com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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00219983221084407.pdf | 1,49 MB | Adobe PDF | Ver/Abrir |