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

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-12-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
1
Series
Composites Communications, Volume 22
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.
Description
Keywords
Aging, Composite cylinder, Filament winding, GFRP composites
Other note
Citation
Antunes, M B, Almeida, J H S & Amico, S C 2020, ' Curing and seawater aging effects on mechanical and physical properties of glass/epoxy filament wound cylinders ', Composites Communications, vol. 22, 100517, pp. 1 . https://doi.org/10.1016/j.coco.2020.100517