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利用加速腐蚀实验、附着力测试、红外光谱分析等手段,研究了几种典型涂层与环氧玻璃钢底材的附着力及其影响因素。玻璃钢与环氧涂层的附着力与玻璃钢表面的粗糙度和润湿性能有关,当玻璃纤维布外露时,涂层附着力最高;240#砂纸打磨底材后涂层附着力高于60#及600#砂纸打磨底材的涂层附着力。不同涂层在玻璃钢表面的附着力与涂层中主要官能团的极性有关,含有极性较强的多卤素键的氟碳树脂漆表现出较强的附着力;与环氧涂层相比,聚氨酯涂层和聚硅氧烷涂层除含有与环氧涂层相同的酯键、醚键外,还因含有氨酯键、硅氧键等极性键,显示出较高的附着力。对比40℃浸泡实验、盐雾实验和湿热实验的结果,40℃浸泡实验对涂层附着力降低的影响更大;红外光谱分析表明,40℃浸泡与盐雾实验相比涂层内部的分子降解程度更明显。
Using accelerated corrosion test, adhesion test, infrared spectroscopy and other means to study the adhesion of several typical coatings and epoxy glass fiber reinforced plastic substrate and its influencing factors. FRP and epoxy coating adhesion and FRP surface roughness and wetting properties, when the exposed glass fiber cloth, the coating adhesion highest; 240 # sandpaper substrate after the coating adhesion is higher than 60 # and 600 # sandpaper polished substrate coating adhesion. The adhesion of different coatings on the surface of FRP is related to the polarity of the main functional groups in the coating, and the fluorocarbon resin paint containing the more polar polyhalogen bond shows stronger adhesion. Compared with the epoxy coating, Polyurethane coating and polysiloxane coating in addition to containing the same epoxy ester coating epoxy ester, ether bond, but also because of urethane bond, silicon oxygen bond and other polar bonds, showing high adhesion. Compared with the result of immersion test, salt spray test and damp heat test at 40 ℃, the soaking test at 40 ℃ had a greater influence on the decrease of the adhesion of the coating. Infrared spectrum analysis showed that the molecular degradation The degree is more obvious.