POM/PU/carbon nanofiber composites produced by water-mediated melt compounding

Structure, thermomechanical and dielectrical properties

S. Siengchin, G. C. Psarras, J. Karger-Kocsis

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Binary and ternary composites composed of polyoxymethylene (POM), polyurethane (PU), and carbon nanofiber (CNF) were produced by water-mediated melt compounding. PU latex and/or aqueous CNF dispersion were introduced into the molten POM in laboratory kneader to prepare toughened and/or nanoreinforced POM composites. The crystallization of the POM-based systems was studied by polarized optical microscopy. The dispersion of the CNF was inspected in scanning electron microscopy. The mechanical and thermomechanical properties of the composites were determined by dynamic-mechanical analysis, thermogravimetric analysis, short-time creep-, stress relaxation-, and uniaxial static tensile tests. The dielectric response of the nanocomposites was investigated by means of broadband dielectric spectroscopy at ambient temperature. CNF worked as reinforcement (i.e., increased the stiffness, resistance to creep, tensile strength, and reduced the elongation at break), and also improved the thermo-oxidative stability of POM. PU alone had an adverse effect to the above listed properties, which could be enhanced again by additional incorporation of CNF. Dielectric spectroscopy proved to be a useful tool to get deeper understanding on morphological changes caused by the additives.

Original languageEnglish
Pages (from-to)1804-1812
Number of pages9
JournalJournal of Applied Polymer Science
Volume117
Issue number3
DOIs
Publication statusPublished - Aug 1 2010

Fingerprint

Carbon nanofibers
Polyurethanes
Water
Composite materials
Dielectric spectroscopy
Creep
Latex
Stress relaxation
Dynamic mechanical analysis
Crystallization
Latexes
Optical microscopy
Thermogravimetric analysis
Molten materials
Elongation
Nanocomposites
Reinforcement
Tensile strength
Stiffness
delrin

Keywords

  • Carbon nanofiber (CNF)
  • Latex
  • Nanocomposite
  • Polymer blend
  • Polyoxymethylene (POM)
  • Polyurethane
  • Structureproperty relationships
  • Toughening

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

Cite this

POM/PU/carbon nanofiber composites produced by water-mediated melt compounding : Structure, thermomechanical and dielectrical properties. / Siengchin, S.; Psarras, G. C.; Karger-Kocsis, J.

In: Journal of Applied Polymer Science, Vol. 117, No. 3, 01.08.2010, p. 1804-1812.

Research output: Contribution to journalArticle

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