Acid-base interactions and interphase formation in particulate-filled polymers

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Abstract

Particulate-filled composites were prepared from CaCO3 and polymer matrices of various acid-base characters. Interfacial interaction of the components was characterized by the reversible work of adhesion, which was calculated either from dipole-dipole or acid-base interactions. The thickness of the spontaneously formed interlayer was derived from the tensile strength of the composites. The results proved that acid-base interactions play an important role in interphase formation. The strength of interfacial adhesion is determined by the joint effect of dispersion forces and acid-base interactions. Stronger interaction leads to a thicker interphase with decreased mobility. Treatment of CaCO3 with an aliphatic fatty acid leads to a decrease in the strength of interaction, and to changes both in the thickness and properties of the interphase. In composites containing coated fillers, acid-base interactions influence composite properties less due to the neutral character of the surface.

Original languageEnglish
Pages (from-to)861-875
Number of pages15
JournalJournal of Adhesion
Volume78
Issue number10
DOIs
Publication statusPublished - Dec 1 2002

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Keywords

  • Acid-base interaction
  • Contact angle
  • Interfacial interaction
  • Interphase thickness
  • Inverse gas chromatography
  • Practiculate-filled polymers
  • Reversible work of adhesion
  • Tensile strength

ASJC Scopus subject areas

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

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