Effect of the degree of crystallinity on the electrical properties of MWCNT filled poly (ethylene-co-ethyl acrylate)/LDPE blend composites prepared by melt mixing

Poly(ethylene-co-ethyl acrylate) (EEA)/multiwalled carbon nanotubes (MWCNTs) master batches are prepared via melt mixing to investigate the effect that blending low density polyethylene (LDPE) into the master batch has on their electrical properties. Blending LDPE into the EEA/MWCNT master batches w...

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Bibliographic Details
Published inComposites science and technology Vol. 117; pp. 351 - 356
Main Authors Han, Sang Hak, Yeom, Yong Sik, Ko, Jeong Gil, Kang, Hee Chul, Yoon, Ho Gyu
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 29.09.2015
Subjects
Carbon nanotubes
Crystallinity
Electrical properties
Nano composites
Polymer-matrix composites
X-ray diffraction
Carbon nanotubes
Polymer-matrix composites
X-ray diffraction
Nano composites
Crystallinity
Electrical properties
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Summary:Poly(ethylene-co-ethyl acrylate) (EEA)/multiwalled carbon nanotubes (MWCNTs) master batches are prepared via melt mixing to investigate the effect that blending low density polyethylene (LDPE) into the master batch has on their electrical properties. Blending LDPE into the EEA/MWCNT master batches with a relatively low ratio of LDPE to EEA improves the electrical conductivity and lowers the percolation threshold as a result of the increase in the dielectric constant of EEA/LDPE blend resin and a better dispersion of MWCNTs. The electrical conductivity of the blend composite peaks at 20% LDPE and is inversely proportional to the degree of crystallinity of the composite. The average size and the number of the MWCNT aggregates decreases after LDPE blending, thus the better distribution is obtained for the MWCNTs without disturbing the formation of conducting paths caused by the presence of crystallites.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2015.07.002