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Durability evaluation of moderate temperature cured E-glass/vinylester systems

机译：中温固化电子玻璃/乙烯基酯体系的耐久性评估

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FRP composites using vinylester resins are increasingly being fabricated for use in civil and marine structures using processes that incorporate ambient and moderate temperature cure regimes. This often results in the final use of the material when cure progression has not reached one hundred percent. This paper presents results of an investigation into deterioration in pultruded E-glass/ vinylester composites due to immersion in deionized water and alkaline solution. Degradation is accelerated through the use of elevated temperatures and results are characterized through moisture uptake measurements, mechanical tests (tension and short-beam-shear), dynamic mechanical thermal analysis (DMTA), and microscopy. It is shown that degradation due to alkali exposure is more severe than due to the deionized water. Data from accelerated tests is used to provide long-term predictions, which are shown to correlate well with experiments in the short-term. The use of DMTA characteristics as a basis for the development of an understanding of degradation phenomena and for further modeling is shown to be a promising avenue for further research.
机译：使用乙烯基酯树脂的FRP复合材料正越来越多地通过结合环境和中温固化方案的工艺来制造用于民用和航海结构。当固化进度未达到100％时，通常会最终使用该材料。本文介绍了由于浸入去离子水和碱性溶液而引起的拉挤电子玻璃/乙烯基酯复合材料劣化的研究结果。通过使用高温加速降解，并通过水分吸收测量，机械测试（拉伸和短光束剪切），动态机械热分析（DMTA）和显微镜来表征结果。结果表明，由于暴露于碱而引起的降解比由于去离子水引起的降解更为严重。来自加速测试的数据可用于提供长期预测，这些预测与短期实验非常相关。使用DMTA特性作为发展对降解现象的理解和进行进一步建模的基础，被证明是进行进一步研究的有希望的途径。

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