Moisture Absorption in Foam-Cored Composite Sandwich Structures
The hygroscopic behavior of sandwich structures composed of E-glass/polyester face sheets bonded to a PVC foam core exposed to 95% relative humidity and immersed in sea-water is examined herein. Moisture uptake was monitored for 11 months yielding absorption curves for samples of polyester resin, laminated composites, PVC foam core, and a sandwich structure. The coefficients of diffusion and moisture saturation values extracted from the curves are significantly greater for the water immersed condition than for the exposed to elevated moisture one, and point to the foam core as the most absorbing material in the sandwich structure. The measured absorption curves are compared to a diffusion model which employs the calculated coefficient of diffusion, showing good agreement. POLYM. COMPOS., 31:714–722, 2010. ª 2009 Society of Plastics Engineers
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| Format: | info:eu-repo/semantics/article biblioteca |
| Language: | eng |
| Subjects: | info:eu-repo/classification/cti/7, info:eu-repo/classification/cti/33, info:eu-repo/classification/cti/3312, |
| Online Access: | http://cicy.repositorioinstitucional.mx/jspui/handle/1003/188 |
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| Summary: | The hygroscopic behavior of sandwich structures composed
of E-glass/polyester face sheets bonded to a
PVC foam core exposed to 95% relative humidity and
immersed in sea-water is examined herein. Moisture
uptake was monitored for 11 months yielding absorption
curves for samples of polyester resin, laminated
composites, PVC foam core, and a sandwich structure.
The coefficients of diffusion and moisture saturation
values extracted from the curves are significantly
greater for the water immersed condition than for the
exposed to elevated moisture one, and point to the
foam core as the most absorbing material in the sandwich
structure. The measured absorption curves are
compared to a diffusion model which employs the calculated
coefficient of diffusion, showing good agreement.
POLYM.
COMPOS., 31:714–722, 2010. ª 2009 Society
of Plastics Engineers |
|---|