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Electrical properties of melt-mixed polypropylene and as-grown carbon nanofiber composites: Analysis of their interphase via the AC conductivity modeling.
In: Journal of Composite Materials, Jg. 56 (2022-05-21), Heft 12, S. 1879-1889
Online
academicJournal
Zugriff:
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. [ABSTRACT FROM AUTHOR]
Titel: |
Electrical properties of melt-mixed polypropylene and as-grown carbon nanofiber composites: Analysis of their interphase via the AC conductivity modeling.
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Autor/in / Beteiligte Person: | Paleo, Antonio J ; Aribou, Najoia ; Nioua, Yassine ; Samir, Zineb ; Fernandes, Lisete ; Moreira, J Agostinho ; Achour, Mohammed E. |
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Zeitschrift: | Journal of Composite Materials, Jg. 56 (2022-05-21), Heft 12, S. 1879-1889 |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 0021-9983 (print) |
DOI: | 10.1177/00219983221084407 |
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