Degradation Characteristics of Glass Fiber Reinforced Plastics Using Unsaturated Polyester as Matrix in Weak Alkaline Aqueous Solution
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- Takeuchi Yosuke
- Access Network Service Systems Laboratories, NTT Corporation
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- Ito Akira
- Access Network Service Systems Laboratories, NTT Corporation
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- Kasahara Hisatoshi
- Access Network Service Systems Laboratories, NTT Corporation
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- Okamura Yosuke
- Access Network Service Systems Laboratories, NTT Corporation
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- Tamamatsu Junichirou
- Access Network Service Systems Laboratories, NTT Corporation
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<p>To verify the applicability of glass-fiber reinforced plastic (GFRP) with an unsaturated polyester matrix in manhole environments, we conducted solution immersion tests in a weak alkaline aqueous solution to evaluate degradation characteristics. The test results clarify the effect of accelerated deterioration due to alkali remaining on the sample surface, that diffusion of alkaline ions is slower than that of water, and that the resin-fiber interface preferentially deteriorates due to the diffusion of water. If water diffusion is the dominant factor in the degradation of the flexural strength of a sample, the degradation of the flexural strength can be extrapolated using a power law equation; however, under conditions where the degradation is also accelerated by alkali, it is appropriate to extrapolate by the degree of degradation using a logarithmic equation that fits the measurement results well. The results showed that the flexural strength of hand-layered GFRP with a thickness of 5 mm and 7 layers in an alkaline solution of pH 10 was estimated to decrease by half in 16.3 to 21 years.</p><p> </p><p>This Paper was Originally Published in Japanese in Zairyo-to-Kankyo 71 (2022) 237–244.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 65 (2), 159-166, 2024-02-01
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390298919731697792
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 033304052
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可