Electrical and dielectric properties of foam injection-molded polypropylene/multiwalled carbon nanotube composites

A. Ameli, M. Nofar, M. Saniei, N. Hobieny, C. B. Park, P. Pötschke

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

A combination of high dielectric permittivity (ε′) and low dielectric lob (tan δ) is required for charge storage applications. In percolative systems such as conductive polymer composites, however, obtaining high ε′ and low tan δ is very challenging due to the sharp insulation-conduction transition near the threshold region. Due to the particular arrangement of conductive fillers induced by both foaming and injection molding procebes, they may addreb this ibue. Therefore, this work evaluates the application of foam injection molding proceb in fabricating polymer nanocomposites for energy storage. Polypropylene-multiwalled carbon nanotubes (PP-MWCNT) composites were prepared by melt mixing and foamed in an injection molding proceb. Electrical conductivity (σ), ε′ and tan δ were then characterized. Also, scanning and transmibion electron microscopy (SEM and TEM) was used to investigate the carbon nanotube's arrangement as well as cellular morphology. The results showed that foam injection-molded composites exhibited highly superior dielectric properties to those of solid counterparts. For instance, foamed samples had ε′=68.3 and tan δ =0.05 (at 1.25 vol.% MWCNT), as opposed to ε′=17.8 and tan δ=0.04 in solid samples (at 2.56 vol.% MWCNT). The results of this work reveal that high performance dielectric nanocomposites can be developed using foam injection molding technologies for charge storage applications.

Original languageEnglish
Title of host publicationProceedings of PPS-30
Subtitle of host publicationThe 30th International Conference of the Polymer Processing Society - Conference Papers
EditorsSadhan C. Jana
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413092
DOIs
Publication statusPublished - 22 May 2015
Externally publishedYes
Event30th International Conference of the Polymer Processing Society, PPS 2014 - Cleveland, United States
Duration: 6 Jun 201412 Jun 2014

Publication series

NameAIP Conference Proceedings
Volume1664
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference30th International Conference of the Polymer Processing Society, PPS 2014
Country/TerritoryUnited States
CityCleveland
Period6/06/1412/06/14

Bibliographical note

Publisher Copyright:
© 2015 AIP Publishing LLC.

Keywords

  • Carbon Nanotube
  • Electrical/Dielectric Properties
  • Foam
  • Injection Molding
  • Nanocomposites

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