The effect of environmental ageing on the interphase in glass fibre - vinyl ester composites

James L Thomason, Georgios Xypolias

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
24 Downloads (Pure)

Abstract

The results of a study of environmental ageing on the apparent interfacial shear strength of glass fibre – vinyl ester microbond samples are presented. The scale related issues of estimating water absorption levels in microbond samples are reviewed and discussed and a solution based on Fickian diffusion is given. Interphase strength of microdroplets aged in water at 23 °C was relatively stable up to 6 days exposure after which strength degradation was fairly rapid. Immersion in water at 50 °C resulted in an immediate 20-30% irreversible loss of strength. Further exposure beyond 2 days led to total loss of integrity of the microbond samples. Electron microscope images of aged microdroplets appeared to show the development of a bi-phasic microstructure. The presence of two phases in small scale vinyl ester polymer samples was confirmed by DMA on thin films.
Original languageEnglish
Pages (from-to)377-391
Number of pages15
JournalComposite Interfaces
Volume30
Issue number4
Early online date5 Sept 2022
DOIs
Publication statusPublished - 3 Apr 2023

Keywords

  • interphase
  • adhesion
  • ageing
  • durability
  • glass fibre
  • vinyl ester

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