PET interleaving veils for improved fracture toughness of glass fibre/low-styrene-emission unsaturated polyester resin composites

Kevin Fitzmaurice, Dipa Roy, Michael A. Mccarthy

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The use of interleaved polyethylene terephthalate (PET) veils to increase the interlaminar fracture toughness of glass fiber-reinforced, low-styrene emission, unsaturated polyester resin composites, was investigated. PET, being chemically similar to the unsaturated polyester resin, was expected to exhibit good wetting and strong interaction with the matrix. Composite laminates were manufactured by hand lay-up, with the veil content varying up to 7%. The effects of PET veils on the interlaminar shear strength, flexural strength, flexural modulus, glass transition temperature, damping parameters, and Mode-I interlaminar fracture toughness of the composite were studied. The veils were found to enhance most of these properties, with only minor negative effects on flexural stiffness and T-g. The PET/resin bonding did indeed prove to be strong, but the enhancement of fracture toughness was not as much as expected, because of the weaker glass/resin interface providing an alternative crack propagation path. (C) 2015 Wiley Periodicals, Inc.

Original languageEnglish
Article number42877
Number of pages8
JournalJournal of Applied Polymer Science
Volume133
Issue number3
DOIs
Publication statusPublished - 15 Jan 2016

Keywords / Materials (for Non-textual outputs)

  • composites
  • mechanical properties
  • polyesters
  • thermosets
  • MODE-I
  • INTERLAMINAR FRACTURE
  • DISCONTINUOUS INTERLEAVES
  • MECHANICAL-PROPERTIES
  • MARINE APPLICATIONS
  • DAMAGE SUPPRESSION
  • NANOTUBES
  • RESISTANCE
  • MORPHOLOGY

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