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摘要
采用芳纶织物与柔性环氧树脂复合,获得高柔韧性的芳纶织物增强环氧复合材料。将柔性复合材料浸泡于一定温度下的原油和盐水两种介质中,研究了温度和介质对其外观形貌和力学性能的影响,并采用Γ.M.Gunyaev中值老化方程估算其5年后拉伸断裂强力保留率。结果表明:试样浸泡至不同温度同一介质中,高温比低温对其外观产生的影响更明显,试样树脂颜色均由无色变成深黑色,试样浸泡至同一温度不同介质中,原油和盐水对试样外观影响效果一致;试样的拉伸断裂强力随浸泡时间的延长表现出先增大后减小的趋势;经2万次屈挠试验,老化1年的试样未破坏;采用中值老化方程估算,在80℃原油浸泡5年后的试样其拉伸断裂强力保留率最低,为62.74%。
Abstract
The highly flexible aramid-reinforced epoxy composites were obtained by compounding aramid fabric with epoxy resin.The flexible composites were immersed in two media,crude oil and brine,at certain temperatures,the effects of temperature and media on their appearance and mechanical properties were studied,and the retention rate of tensile fracture strength after 5 years was estimated by Gunyaev median aging equation.The results showed that when the samples were immersed in the same medium at different temperatures,the high temperature had a more obvious effect on their appearance than the low temperature,and the sample color changed from colorless to dark black.When the samples were immersed in different media at the same temperature,the effect of crude oil and brine on the appearance of the samples was the same.The tensile fracture strength of the samples showed a trend of first increasing and then decreasing with the prolongation of immersion time.After 20000 flexural tests,the samples aged for 1 year were not damaged.The median aging equation was used to estimate the tensile fracture strength retention rate,and the samples immersed in crude oil at 80℃ for 5 years had the lowest tensile fracture strength retention rate of 62.74%.
关键词
芳纶
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环氧柔性复合材料
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耐介质
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老化
Key words
aramid
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epoxy flexible composite
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medium resistance
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aging
芳纶增强环氧柔性复合材料耐介质老化行为研究[J].
化工新型材料, 2023, 51(12): 138-142 DOI:10.19817/j.cnki.issn1006-3536.2023.12.045
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