{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T09:50:38Z","timestamp":1777801838954,"version":"3.51.4"},"reference-count":54,"publisher":"SAGE Publications","issue":"12","license":[{"start":{"date-parts":[[2022,3,30]],"date-time":"2022-03-30T00:00:00Z","timestamp":1648598400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"funda\u00e7\u00e3o para a ci\u00eancia e a tecnologia","doi-asserted-by":"publisher","award":["\u201cPlurianual\u201d 2020\u20132023 Project UIDB\/00264\/20"],"award-info":[{"award-number":["\u201cPlurianual\u201d 2020\u20132023 Project UIDB\/00264\/20"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Composite Materials"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:p>\n                    The morphology, crystallinity, and electrical conductivity (\u03c3\u2032 and \u03c3\u2033) 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\u2013conductor transition at CNF contents near 0.9 vol. %. The degree of crystallinity of PP\/CNF composites with loadings of 1.4 vol. % increases \u223c15% with respect to the neat PP (\u223c34%), with \u03c3\u00b4 \u223c 8.6 \u00d7 10\n                    <jats:sup>\u22125<\/jats:sup>\n                    S m\n                    <jats:sup>\u22121<\/jats:sup>\n                    (\u03c3\u2033 \u223c 8.3 \u00d7 10\n                    <jats:sup>\u22124<\/jats:sup>\n                    S m\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) at 2\u00a0MHz. In addition, the values of the electrical conductivity \u03c3\n                    <jats:sub>int<\/jats:sub>\n                    \u00b4 \u223c2.9 \u00d7 10\n                    <jats:sup>\u22126<\/jats:sup>\n                    S m\n                    <jats:sup>\u22121<\/jats:sup>\n                    (\u03c3\n                    <jats:sub>int<\/jats:sub>\n                    \u2033\u223c3.7 \u00d7 10\n                    <jats:sup>\u22124<\/jats:sup>\n                    S m\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) at 2\u00a0MHz, as a result of the interphase (\u03d5\n                    <jats:sub>int<\/jats:sub>\n                    \u223c0.05 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.\n                  <\/jats:p>","DOI":"10.1177\/00219983221084407","type":"journal-article","created":{"date-parts":[[2022,3,30]],"date-time":"2022-03-30T16:12:39Z","timestamp":1648656759000},"page":"1879-1889","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":13,"title":["Electrical properties of melt-mixed polypropylene and as-grown carbon nanofiber composites: Analysis of their interphase\n                    <i>via<\/i>\n                    the AC conductivity modeling"],"prefix":"10.1177","volume":"56","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4688-5794","authenticated-orcid":false,"given":"Antonio J","family":"Paleo","sequence":"first","affiliation":[{"name":"2C2T, Centro de Ci\u00eancia e Tecnologia T\u00eaxtil, Universidade Do Minho, Portugal"}]},{"given":"Najoia","family":"Aribou","sequence":"additional","affiliation":[{"name":"Faculty of Sciences, Laboratory of Material Physics and Subatomic, Ibn Tofail University, Morocco"}]},{"given":"Yassine","family":"Nioua","sequence":"additional","affiliation":[{"name":"Faculty of Sciences, Laboratory of Material Physics and Subatomic, Ibn Tofail University, Morocco"}]},{"given":"Zineb","family":"Samir","sequence":"additional","affiliation":[{"name":"Faculty of Sciences, Laboratory of Material Physics and Subatomic, Ibn Tofail University, Morocco"}]},{"given":"Lisete","family":"Fernandes","sequence":"additional","affiliation":[{"name":"UME, Electron Microscopy Unit and CQVR, Centre of Chemistry-Vila Real, Tr\u00e1s-os-Montes and Alto Douro University, Portugal"}]},{"given":"J Agostinho","family":"Moreira","sequence":"additional","affiliation":[{"name":"IFIMUP -Institute of Physics for Advanced Materials, Faculdade de Ci\u00eancias da Universidade Do Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7786-0645","authenticated-orcid":false,"given":"Mohammed E.","family":"Achour","sequence":"additional","affiliation":[{"name":"Faculty of Sciences, Laboratory of Material Physics and Subatomic, Ibn Tofail University, 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