Effect of nucleation, filler anisotropy and orientation on the properties of PP composites

B. Pukánszky, K. Belina, A. Rockenbauer, F. H J Maurer

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Polypropylene (pp) composites containing CaCO3 and talc were prepared and investigated as a function of composition. The effect of nucleation was studied by thermoanalytical methods, structure and particle orientation were investigated by electron spin resonance spectroscopy, light and electron microscopies, while tensile and fracture tests were carried out to characterize mechanical properties. For both types of composite, particle anisotropy and orientation have a more pronounced effect on properties than nucleation. Orientation of the anisotropic filler particles occurs even under mild shearing conditions and its degree depends on the composition. In tension, the composition dependences of the yield stress and tensile strength are determined by the decrease of effective load-bearing cross-section and interaction. In impact, crack initiation plays an increased role, as does the reinforcing effect of the filler. In failure of particulate-filled composites the main energy-consuming process is plastic deformation of the matrix, which is modified by the presence of the filler. Dewetting increases, while interfacial interaction and formation of an interphase decrease, plastic deformation and energy consumption.

Original languageEnglish
Pages (from-to)205-214
Number of pages10
JournalComposites
Volume25
Issue number3
DOIs
Publication statusPublished - 1994

Fingerprint

Fillers
Anisotropy
Nucleation
Plastic deformation
Composite materials
Bearings (structural)
Chemical analysis
Electron spin resonance spectroscopy
Talc
Polypropylenes
Shearing
Crack initiation
Electron microscopy
Optical microscopy
Yield stress
Tensile strength
Energy utilization
Mechanical properties

Keywords

  • CaCO
  • composition
  • filler anisotropy
  • filler orientation
  • nucleation
  • particle-filled composites
  • polypropylene
  • talc

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Effect of nucleation, filler anisotropy and orientation on the properties of PP composites. / Pukánszky, B.; Belina, K.; Rockenbauer, A.; Maurer, F. H J.

In: Composites, Vol. 25, No. 3, 1994, p. 205-214.

Research output: Contribution to journalArticle

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