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Fracture of mica-reinforced polypropylene : mica concentration effect

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1002/pc.750060410
AuthorSearch for: 1; Search for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada
FormatText, Article
Abstract
Concepts of post‐yield fracture mechanics were used to characterize the crack initiation and propagation resistances of mica‐reinforced polypropylene containing different mica concentrations. Although mica addition leads to an apparently brittle composite, the crack initiation resistance is slightly increased with mica concentration up to 10 percent by weight; and significant improvement in crack propagation performance was found for polypropylene reinforced by up to 20 percent of mica in comparison to that of virgin polypropylene. The debonding of the interface between mica flakes and the matrix leads to a micro‐ductility ahead of the crack tip in which the matrix is able to pull‐out from mica particles and to stretch. This micro‐ductility also prevents the brittle, unstable crack propagation, which is due to the coalescence of voids in pure polypropylene. Above 20 percent of mica, the reduction of the effective amount of the matrix material results in a substantial drop in the resistance to crack growth of mica‐reinforced polypropylene.
Publication date
PublisherWiley
In
  • Polymer Composites 6, no. 4: 249–260.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 29298
NRC-IGM86-103-359
NPARC number23004014
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Record identifier8c525db5-c0e2-4885-8df4-9dd551d701c9
Record created2018-09-17
Record modified2020-03-17
Date modified: