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The frequency dependence of the electrical conductivity obeys the universal dynamic response. Positive temperature coefficient in resistivity and negative temperature coefficient in resistivity phenomena were observed at temperatures below and above the glass transition respectively. It was found that the mechanism responsible for the changes in resistivity is predominantly due to the tunneling effect. Positive temperature coefficient in resistivity intensity was also exploited which is strongly dependent on the carbon nanotube content. <\/jats:p>","DOI":"10.1177\/0021998315618249","type":"journal-article","created":{"date-parts":[[2015,12,1]],"date-time":"2015-12-01T01:08:14Z","timestamp":1448932094000},"page":"3283-3290","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":46,"title":["Electrical conductivity of multiwalled carbon nanotubes\/polyester polymer nanocomposites"],"prefix":"10.1177","volume":"50","author":[{"given":"K","family":"Abazine","sequence":"first","affiliation":[{"name":"LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn Tofail University, Morocco"}]},{"given":"H","family":"Anakiou","sequence":"additional","affiliation":[{"name":"Physics Laboratory of Solids and Thin Films, Faculty of Science, Semlalia, Marrakech, Morocco"}]},{"given":"M","family":"El Hasnaoui","sequence":"additional","affiliation":[{"name":"LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn Tofail University, Morocco"}]},{"given":"MPF","family":"Gra\u00e7a","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, Portugal"}]},{"given":"MA","family":"Fonseca","sequence":"additional","affiliation":[{"name":"Mechanical Engineering Department, University of Aveiro, Portugal"}]},{"given":"LC","family":"Costa","sequence":"additional","affiliation":[{"name":"I3N and Physics Department, University of Aveiro, Portugal"}]},{"given":"ME","family":"Achour","sequence":"additional","affiliation":[{"name":"LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn Tofail University, Morocco"}]},{"given":"A","family":"Oueriagli","sequence":"additional","affiliation":[{"name":"Physics Laboratory of Solids and Thin Films, Faculty of Science, Semlalia, Marrakech, Morocco"}]}],"member":"179","published-online":{"date-parts":[[2016,7,28]]},"reference":[{"key":"bibr1-0021998315618249","first-page":"042903 (1\u20133)","volume":"87","author":"Wang L","year":"2005","journal-title":"Appl Phys Lett"},{"key":"bibr2-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1016\/S0266-3538(02)00129-X"},{"key":"bibr3-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1063\/1.2432232"},{"key":"bibr4-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1002\/app.10436"},{"key":"bibr5-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1016\/S0032-3861(99)00166-4"},{"key":"bibr6-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1016\/S0032-3861(02)00151-9"},{"key":"bibr7-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1016\/j.jnoncrysol.2012.07.008"},{"key":"bibr8-0021998315618249","first-page":"1","volume":"2","author":"El Hasnaoui M","year":"2011","journal-title":"J Mater Environ Sci"},{"key":"bibr9-0021998315618249","doi-asserted-by":"publisher","DOI":"10.1002\/app.10720"},{"key":"bibr10-0021998315618249","first-page":"159","volume":"2","author":"Park SJ","year":"2001","journal-title":"Carbon Lett"},{"key":"bibr11-0021998315618249","unstructured":"Costa LC. 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