Nanocomposites: Manufacturing, microstructural characterization and mechanical testing

Petar Dotchev, Seyed Hamid Reza Sanei, Erik Stienmetz, Jason Williams

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Carbon Nanotubes (CNT) offer exceptional thermal, electrical and mechanical properties. While an increase in thermal and electrical conductivity can be readily achieved by addition of CNT to a polymer base, the subsequent effect on mechanical properties must be investigated. In this study, nanocomposite samples were manufactured using injection molding process. Multiwall Carbon Nanotube (MWCNT) masterbatch with 15 wt.% MWCNT concentrations were diluted with PA 6/6 pellets to create five different CNT concentration ranging from 3 wt.% in 3 wt.% increments. The neat polymer sample was also manufactured as a control specimen. Mechanical properties such as Young's modulus, Tensile strength and elongations were determined to see the effect of CNT content on overall properties. Scanning Electron Microscopy (SEM) images were used to evaluate the uniform distribution of CNT in the polymer phase. The results showed that the stiffness increased as the CNT content increased, however, the increase in strength reached a threshold value around 6 wt.% beyond which the strength decreased. It was observed that the elongation decreased significantly by addition of CNT into the polymer. The elongation dropped from an average of 190% for the neat sample to 5% for 15 wt.% CNT content sample. Such decrease in elongation might render the polymer unsuitable for the application it has been designed for. The findings of this study show that improving thermal and electrical properties of polymers does not come without a sacrifice on mechanical properties.

Original languageEnglish (US)
Title of host publication33rd Technical Conference of the American Society for Composites 2018
PublisherDEStech Publications Inc.
Pages1921-1933
Number of pages13
ISBN (Electronic)9781510872073
StatePublished - Jan 1 2018
Event33rd Technical Conference of the American Society for Composites 2018 - Seattle, United States
Duration: Sep 24 2018Sep 27 2018

Publication series

Name33rd Technical Conference of the American Society for Composites 2018
Volume3

Other

Other33rd Technical Conference of the American Society for Composites 2018
CountryUnited States
CitySeattle
Period9/24/189/27/18

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Metals and Alloys

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    Dotchev, P., Sanei, S. H. R., Stienmetz, E., & Williams, J. (2018). Nanocomposites: Manufacturing, microstructural characterization and mechanical testing. In 33rd Technical Conference of the American Society for Composites 2018 (pp. 1921-1933). (33rd Technical Conference of the American Society for Composites 2018; Vol. 3). DEStech Publications Inc..