Effect of the consolidation degree on the fracture and failure behavior of self-reinforced polypropylene composites as assessed by acoustic emission

András Izer, Ariel Stocchi, Tamás Bárány, Valeria Pettarin, Celina Bernal, Tibor Czigány

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this work, the fracture and failure behavior of self-reinforced polypropylene composites (SRPPC) was studied. As reinforcement woven fabric, whereas as matrix materials α and β crystal forms of isotactic polypropylene (PP) homopolymer and random PP copolymer (with ethylene) were used. Composite sheets were produced by a film-stacking method and compression molded for constant holding time and at constant pressure but at different processing temperatures to obtain SRPPC sheets with different consolidation quality. The failure behavior of tensile specimens was assessed by the acoustic emission (AE) technique and the typical failure behavior was deduced for the differently consolidated composites. Both the number of AE events and the shape of the cumulative AE events versus deformation curve depend on the adhesion between phases. Correlations between the dominant failure mechanisms and AE events amplitude for model specimens were established which can be used to monitor the damage growth process in SRPPCs.

Original languageEnglish
Pages (from-to)2106-2113
Number of pages8
JournalPolymer Engineering and Science
Volume50
Issue number11
DOIs
Publication statusPublished - Nov 1 2010

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ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

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