Influence of weathering on unreinforced and short glass fibre reinforced thermoplastic polyester

N. S. Choi, K. Takahashi, D. Oschmann, J. Karger-Kocsis, K. Friedrich

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10 Citations (Scopus)


The influence of weathering on fracture toughness, Jc, yield strength, σy, local ultrasonic velocity, VR, and microhardness, Hu, in unreinforced and a short glass-fibre-reinforced polyester-based thermoplastic "Xenoy" has been investigated. Unreinforced material weathered for 11 months outdoors in Perth, West Australia, exhibited a significant decrease in VR and Jc, whereas little change was shown in σy, Hu and the fracture surface morphology. Irradiation for 1000 h by artificial ultraviolet rays upon the unreinforced material caused a considerable increase in Hu and only a slight deterioration in VR of the surface layer. Filling with the short fibres induced an improvement in σy and a large reduction in Jc for the unreinforced material. The natural weathering of the reinforced material caused a small reduction in Jc but a large degradation in the slope of the R-curve. It was concluded that the measurement of Jc and the slope of R-curve in combination with VR and Hu was an effective way to study the effects of weathering on engineering plastics.

Original languageEnglish
Pages (from-to)2529-2535
Number of pages7
JournalJournal of Materials Science
Issue number10
Publication statusPublished - Jan 1 1998


ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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