Micromechanical deformation processes in PP/wood composites: Particle characteristics, adhesion, mechanisms

Károly Renner, Csaba Kenyó, János Móczó, Béla Pukánszky

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Polypropylene (PP) was reinforced with four natural fillers having different particle characteristics. Interfacial adhesion was changed by the introduction of maleated polypropylene (MAPP). The properties of the studied PP/wood composites depended strongly on interfacial adhesion and on the particle characteristics of the wood. Coupling with functionalized polymer is necessary for the preparation of composites with acceptable properties if the size of the particles is large and their aspect ratio is small. The effect of adhesion is smaller for particles with large aspect ratio. Several micromechanical deformation processes may occur in PP/wood composites including matrix yielding, debonding, fiber pull-out and fiber fracture both parallel and perpendicular to the fiber axis. The processes are competitive and may take place simultaneously and/or consecutively. The inherent properties of the reinforcement may limit the improvement of composite strength. Micromechanical deformation processes determine composite properties irrespectively of their mechanism.

Original languageEnglish
Pages (from-to)1653-1661
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume41
Issue number11
DOIs
Publication statusPublished - Nov 1 2010

Keywords

  • A. Particle-reinforcement
  • A. Wood
  • B. Interface/interphase
  • C. Micro-mechanics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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