Preferential positioning of γ-ray treated multi-walled carbon nanotubes in polyamide 6,6/poly(p-phenylene ether) blends

Sung Cik Mun, Mokwon Kim, Choon Soo Lee, Min Hee Lee, Younggon Son, O. Ok Park

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Morphological characteristics and electrical conductivity of polyamide 6,6/poly(p-phenylene ether)/multi-walled carbon nanotube (PA66/PPE/MWCNT) ternary nanocomposites were investigated. The MWCNTs were modified by 60Co gamma ray (γ-ray) irradiation under a dry condition and O2 atmosphere, which introduces oxygen-containing functional groups on the surfaces of the MWCNTs and thereby provides better compatibility with the hydrophilic PA66 phase. It was observed that the MWCNTs are preferentially positioned in the continuous PA66 matrix, whereas PPE domains are almost free of MWCNTs. Since PA66 consists of a continuous phase and the MWCNTs are preferentially positioned in the PA66 phase, electrical conductivity of PA66/PPE/MWCNT ternary composites is higher than that of PA66/MWCNT binary composites at the same MWCNT content. It was observed that raising the processing temperature and increasing the mixing time were effective means of improving the electrical conductivity of the composites, via enhancement of MWCNT dispersion. [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)356-361
Number of pages6
JournalMacromolecular Research
Volume21
Issue number4
DOIs
StatePublished - Apr 1 2013

Keywords

  • carbon nanotubes
  • gamma ray
  • preferential positioning
  • surface treatment

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