Comparison of exfoliated graphite nanoplatelets (xGnP) and CNTs for reinforcement of EVA nanocomposites fabricated by solution compounding method and three screw rotating systems

Sumin Kim, Lawrence T. Drzal

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Exfoliated graphite nanoplatelet (xGnPTM) and carbon nanotube (CNT)-reinforced ethylene vinyl acetate (EVA) nanocomposites have been fabricated by three screw rotating systems: co-, counter- and modified-co-rotating. The highest tensile strength and modulus were shown by the composites, both xGnP- and CNT-loaded, made by counter-rotating. The counter-rotating process produced better dispersion than the other two as found in morphology studies by environmental scanning electron microscopy (ESEM). However, the rotating system did not affect the electrical conductivity. The percolation threshold of the xGnP-EVA nanocomposites formed by solution mixing and injection molding was between 14-16 wt%, due to the advantageous effect of sheets with higher aspect ratios compared with spherical or elliptical fillers in forming conducting networks in the polymer matrix. Although CNT-EVA was electrically conductive with only 5 wt% CNT loading, we recommend xGnP as a more suitable additive material for polymer composites. xGnP greatly increased the thermal stability of xGnP-EVA composites to be applied as adhesives, films and cables.

Original languageEnglish
Pages (from-to)1623-1638
Number of pages16
JournalJournal of Adhesion Science and Technology
Volume23
Issue number12
DOIs
Publication statusPublished - 2009 Sep 1

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compounding
Carbon Nanotubes
Graphite
screws
butadiene
reinforcement
acetates
Carbon nanotubes
Nanocomposites
nanocomposites
Reinforcement
Ethylene
graphite
carbon nanotubes
counters
Composite materials
composite materials
Polymer matrix
Injection molding
injection molding

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Chemistry(all)
  • Surfaces and Interfaces

Cite this

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abstract = "Exfoliated graphite nanoplatelet (xGnPTM) and carbon nanotube (CNT)-reinforced ethylene vinyl acetate (EVA) nanocomposites have been fabricated by three screw rotating systems: co-, counter- and modified-co-rotating. The highest tensile strength and modulus were shown by the composites, both xGnP- and CNT-loaded, made by counter-rotating. The counter-rotating process produced better dispersion than the other two as found in morphology studies by environmental scanning electron microscopy (ESEM). However, the rotating system did not affect the electrical conductivity. The percolation threshold of the xGnP-EVA nanocomposites formed by solution mixing and injection molding was between 14-16 wt{\%}, due to the advantageous effect of sheets with higher aspect ratios compared with spherical or elliptical fillers in forming conducting networks in the polymer matrix. Although CNT-EVA was electrically conductive with only 5 wt{\%} CNT loading, we recommend xGnP as a more suitable additive material for polymer composites. xGnP greatly increased the thermal stability of xGnP-EVA composites to be applied as adhesives, films and cables.",
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N2 - Exfoliated graphite nanoplatelet (xGnPTM) and carbon nanotube (CNT)-reinforced ethylene vinyl acetate (EVA) nanocomposites have been fabricated by three screw rotating systems: co-, counter- and modified-co-rotating. The highest tensile strength and modulus were shown by the composites, both xGnP- and CNT-loaded, made by counter-rotating. The counter-rotating process produced better dispersion than the other two as found in morphology studies by environmental scanning electron microscopy (ESEM). However, the rotating system did not affect the electrical conductivity. The percolation threshold of the xGnP-EVA nanocomposites formed by solution mixing and injection molding was between 14-16 wt%, due to the advantageous effect of sheets with higher aspect ratios compared with spherical or elliptical fillers in forming conducting networks in the polymer matrix. Although CNT-EVA was electrically conductive with only 5 wt% CNT loading, we recommend xGnP as a more suitable additive material for polymer composites. xGnP greatly increased the thermal stability of xGnP-EVA composites to be applied as adhesives, films and cables.

AB - Exfoliated graphite nanoplatelet (xGnPTM) and carbon nanotube (CNT)-reinforced ethylene vinyl acetate (EVA) nanocomposites have been fabricated by three screw rotating systems: co-, counter- and modified-co-rotating. The highest tensile strength and modulus were shown by the composites, both xGnP- and CNT-loaded, made by counter-rotating. The counter-rotating process produced better dispersion than the other two as found in morphology studies by environmental scanning electron microscopy (ESEM). However, the rotating system did not affect the electrical conductivity. The percolation threshold of the xGnP-EVA nanocomposites formed by solution mixing and injection molding was between 14-16 wt%, due to the advantageous effect of sheets with higher aspect ratios compared with spherical or elliptical fillers in forming conducting networks in the polymer matrix. Although CNT-EVA was electrically conductive with only 5 wt% CNT loading, we recommend xGnP as a more suitable additive material for polymer composites. xGnP greatly increased the thermal stability of xGnP-EVA composites to be applied as adhesives, films and cables.

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