Moisture absorption properties of unidirectional glass/polymer composites used in composite (non-ceramic) insulators
(2004) In Composites Part A: Applied Science and Manufacturing 35(9). p.1049-1063- Abstract
Moisture absorption tests were performed on unidirectional glass/polymer composite materials used in high voltage composite (non-ceramic) insulators. The composites were based on E-glass, high seed count ECR-glass and low seed count ECR-glass fibers with modified polyester, epoxy and vinyl ester resins. The composites were exposed to a moist environment with a relative humidity of 80% at 50 °C, and their resistance to moisture absorption in terms of the rate of moisture absorption, maximum moisture content and apparent diffusivities was determined. Moisture absorption in unidirectional composite specimens was also studied numerically in this work using finite element techniques. In particular, the effects of specimen geometry (the edge... (More)
Moisture absorption tests were performed on unidirectional glass/polymer composite materials used in high voltage composite (non-ceramic) insulators. The composites were based on E-glass, high seed count ECR-glass and low seed count ECR-glass fibers with modified polyester, epoxy and vinyl ester resins. The composites were exposed to a moist environment with a relative humidity of 80% at 50 °C, and their resistance to moisture absorption in terms of the rate of moisture absorption, maximum moisture content and apparent diffusivities was determined. Moisture absorption in unidirectional composite specimens was also studied numerically in this work using finite element techniques. In particular, the effects of specimen geometry (the edge effect) and specimen orthotropy on moisture absorption by the composites were evaluated. Significant differences in the moisture absorption properties of the composites were found indicating that the effect of moisture on the mechanical and electrical properties of the insulators will depend on the type of composite used. It was shown that the vinyl ester based materials had the most favorable moisture diffusion properties for use in high voltage composite insulator applications. The modified polyester based composites exhibited the worst moisture absorption performance. The epoxy-based materials had adequate rates of absorption, however, these materials did not reach equilibrium and kept slowly taking on more moisture in a non-Fickian manner.
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- author
- Kumosa, L. LU ; Benedikt, B. ; Armentrout, D. and Kumosa, M.
- publishing date
- 2004-09
- type
- Contribution to journal
- publication status
- published
- keywords
- A. glasses, A. Polymer
- in
- Composites Part A: Applied Science and Manufacturing
- volume
- 35
- issue
- 9
- pages
- 1049 - 1063
- publisher
- Elsevier
- external identifiers
-
- scopus:2942612446
- ISSN
- 1359-835X
- DOI
- 10.1016/j.compositesa.2004.03.008
- language
- English
- LU publication?
- no
- id
- da13c9a9-64f2-47a5-b105-ebca37bab71c
- date added to LUP
- 2022-11-26 13:30:42
- date last changed
- 2022-11-28 08:54:08
@article{da13c9a9-64f2-47a5-b105-ebca37bab71c,
abstract = {{<p>Moisture absorption tests were performed on unidirectional glass/polymer composite materials used in high voltage composite (non-ceramic) insulators. The composites were based on E-glass, high seed count ECR-glass and low seed count ECR-glass fibers with modified polyester, epoxy and vinyl ester resins. The composites were exposed to a moist environment with a relative humidity of 80% at 50 °C, and their resistance to moisture absorption in terms of the rate of moisture absorption, maximum moisture content and apparent diffusivities was determined. Moisture absorption in unidirectional composite specimens was also studied numerically in this work using finite element techniques. In particular, the effects of specimen geometry (the edge effect) and specimen orthotropy on moisture absorption by the composites were evaluated. Significant differences in the moisture absorption properties of the composites were found indicating that the effect of moisture on the mechanical and electrical properties of the insulators will depend on the type of composite used. It was shown that the vinyl ester based materials had the most favorable moisture diffusion properties for use in high voltage composite insulator applications. The modified polyester based composites exhibited the worst moisture absorption performance. The epoxy-based materials had adequate rates of absorption, however, these materials did not reach equilibrium and kept slowly taking on more moisture in a non-Fickian manner.</p>}},
author = {{Kumosa, L. and Benedikt, B. and Armentrout, D. and Kumosa, M.}},
issn = {{1359-835X}},
keywords = {{A. glasses; A. Polymer}},
language = {{eng}},
number = {{9}},
pages = {{1049--1063}},
publisher = {{Elsevier}},
series = {{Composites Part A: Applied Science and Manufacturing}},
title = {{Moisture absorption properties of unidirectional glass/polymer composites used in composite (non-ceramic) insulators}},
url = {{http://dx.doi.org/10.1016/j.compositesa.2004.03.008}},
doi = {{10.1016/j.compositesa.2004.03.008}},
volume = {{35}},
year = {{2004}},
}