The development of conductive carbon nanotube network in polypropylene-based composites during simultaneous biaxial stretching

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DOIResolve DOI: http://doi.org/10.1016/j.eurpolymj.2012.03.005
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TypeArticle
Journal titleEuropean Polymer Journal
ISSN0014-3057
Volume48
Issue5
Pages930939; # of pages: 10
SubjectBiaxial stretching; Polymer-matrix composites; Carbon nanotube; Electrical properties
AbstractThe development of electronic conducting networks during the simultaneous biaxial stretching of isotactic polypropylene/carbon nanotube (iPP/CNT) composites was investigated. During the stretching process, the electrical resistivity of the composites was found to be very sensitive to the draw ratios. This was especially true at CNT concentration close to the percolation threshold, ca. 2.2 vol.%. The resistivity–draw ratio dependence was divided into two stages. In the first stage, the stretching was taken by the amorphous zones and only led to the enlargement of the distance between CNT aggregates. This resulted in the breaking of the conductive network and, consequently, a sharp increase in resistivity. As the turning point was approached, individual nanotubes started to disentangle from CNT aggregates. Meanwhile, the resistivity of the stretched films was dramatically decreased by 7 orders of magnitude, indicating a rebuilding of the conducting network during the biaxial stretching process.
Publication date
LanguageEnglish
AffiliationAutomotive; National Research Council Canada
Peer reviewedYes
IdentifierS0014305712000675
NPARC number21268756
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Record identifier5ccdff83-691e-4038-aa0f-f7a0157a0d2e
Record created2013-11-12
Record modified2016-05-09
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