Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders

Marcelo B. Antunes, Humberto Almeida Jr, Sandro C. Amico

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Polymer composites in marine structures that operate under seawater environment may be seriously affected, reducing durability estimates. This work aims at evaluating the effect of seawater exposure at 80 °C for 7–28 days on filament-wound glass fiber/epoxy composite cylinders partially cured by passing saturated steam through them just after winding seeking a faster curing route. The winding angle is varied (±55, ±65 and ± 75) and some of the cylinders are later post-cured for comparison. The unaged partially cured specimens do not reach complete curing, with a glass transition temperature (Tg) of 132 °C, below the Tg for the other samples (154–159 °C). Fully cured cylinders present mechanical properties slightly higher than partially cured ones. Moreover, aging in seawater for 7 days enhances the cross-linking degree of epoxy, with a positive effect on both hoop tensile strength and stiffness. Aging is, however, not critical for the radial compressive properties.
Original languageEnglish
Article number100517
Number of pages6
JournalComposites Communications
Volume22
Early online date02 Oct 2020
DOIs
Publication statusPublished - Dec 2020

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