Morphological influence of carbon modifiers on the electromagnetic shielding of their linear low density polyethylene composites

Villacorta, Byron S. and Ogale, Amod A. (2014) Morphological influence of carbon modifiers on the electromagnetic shielding of their linear low density polyethylene composites. Journal of Applied Polymer Science, 131 24: 41055-1-41055-11. doi:10.1002/app.41055


Author Villacorta, Byron S.
Ogale, Amod A.
Title Morphological influence of carbon modifiers on the electromagnetic shielding of their linear low density polyethylene composites
Journal name Journal of Applied Polymer Science   Check publisher's open access policy
ISSN 1097-4628
0021-8995
Publication date 2014-12-15
Year available 2014
Sub-type Article (original research)
DOI 10.1002/app.41055
Open Access Status
Volume 131
Issue 24
Start page 41055-1
End page 41055-11
Total pages 11
Place of publication Hoboken NJ, United States
Publisher John Wiley & Sons
Collection year 2015
Language eng
Formatted abstract
The influence of morphology of carbon modifiers on the electrical, thermal, and mechanical properties of their polyethylene-matrix composites is reported. Four heat-treated (HT) carbon modifiers were investigated: PR-19-HT carbon nanofibers, multiwalled carbon nanotubes (MWNT-HT), helical multiwalled carbon nanotubes (HCNT-HT), and mesophase pitch-based P-55 carbon fibers as a control. These were melt-mixed with linear low density polyethylene at 10 vol %, which was above the percolation threshold. The electromagnetic shielding effectiveness (EM SE) of the composites exhibits significant dependence on the modifier morphology. Thus, MWHTs, with the highest aspect ratio, lead to the highest composite electrical and thermal conductivities (34 Sm−1 and 1 Wm−1 K−1) and EM SE (∼24 dB). In contrast, HCNT, due to their coiled shape and low aspect ratio, lead to segregated microstructure and low EM SE (<1 dB). However, these composites display the highest ductility (∼250%) and flexibility, probably due to matrix-modifier mechanical bonding provided by the helical morphology.
Keyword Composites
Graphene and fullerenes
Microscopy
Morphology
Nanotubes
X-ray
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
Official Audit
 
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Created: Sun, 17 May 2015, 20:18:31 EST by Byron Villacorta Hernandez on behalf of School of Chemical Engineering