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首页> 外文期刊>e-Polymers >Damage indication of 2′, 7′-dichlorofluorescein for epoxy polymer and the effect of water on its damage indicating ability
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Damage indication of 2′, 7′-dichlorofluorescein for epoxy polymer and the effect of water on its damage indicating ability

机译：2'，7'-二氯荧光素对环氧聚合物的破坏指示以及水对其破坏指示能力的影响

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摘要

Epoxy polymer with damage indicating ability was very usable for ships and bridges to detect the cracks at an early stage and to prevent corrosion. 2′, 7′-dichlorofluorescein (DCF), as a damage indicator, was used to report the mechanical damage of epoxy-amine polymer by a strong color change from a light yellow to bright red due to the molecular structure transition from the acid molecular form to the base ion form. The effect of water on damage indicator and damaged epoxy-amine polymer film was evaluated by an immersion test and the properties were characterized by ultraviolet-visible spectrophotometry (UV-Vis), scanning electronic microscopy (SEM), energy dispersive X-ray spectrometer (EDS), zeta potential and thermal gravimetric analysis (TGA). The results showed that DCF was an easy, stable and permanent indicator for epoxy-amine polymer and the water only had a slight influence on the indication stability of damaged epoxy polymer.
机译：具有损伤指示能力的环氧聚合物非常适用于船舶和桥梁，以及早发现裂纹并防止腐蚀。 2'，7'-dichlorofluorescein（DCF）作为损伤指示剂，用于报告环氧胺聚合物由于分子结构从酸性分子转变而由浅黄色变为亮红色而引起的机械损伤到碱性离子形式通过浸没试验评估水对损伤指示剂和受损的环氧胺聚合物膜的影响，并通过紫外可见分光光度法（UV-Vis），扫描电子显微镜（SEM），能量色散X射线光谱仪（ EDS），ζ电位和热重分析（TGA）。结果表明，DCF是一种简便，稳定和持久的环氧胺聚合物指示剂，而水对受损的环氧聚合物的指示稳定性影响很小。

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