Abstract This paper presents corrosion and abrasion resistance of an epoxy system modified by using a synthesized epoxy terminated polybutadiene (ETPB) resin with good toughening properties. The effect of this modification on the hardness, abrasion, thermal and corrosion protection performance of the resultant modified coatings was investigated. Pendulum hardness test showed that the incorporation of ETPB into epoxy matrix increased damping energy of the system. Taber experiment showed that rubber modification increased abrasion resistance of epoxy coatings. Thermal gravimetric analysis (TGA) of samples showed that the thermal resistance of ETPB modified epoxy coatings was almost the same as that for the neat one. The corrosion protection performance of rubber modified and unmodified epoxy coatings were investigated using electrochemical impedance spectroscopy (EIS) in 3.5% sodium chloride solution for a period of 90 days. EIS studies showed that both coatings remained intact with good corrosion resistance properties. Film resistance of unmodified and ETPB modified epoxy coatings after 90 days of immersion were found to be 2.59 × 10 10 Ω cm 2 and 2.70 × 10 10 Ω cm 2 , respectively. The addition of hydrophobic butadiene rubber into epoxy resin increased the water contact angle from 77° to 85°. This increment in hydrophobicity decreased the water uptake of modified epoxy coating.

中文翻译：

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橡胶改性薄膜环氧树脂的增韧机制：第 2 部分 - 耐磨性、耐热性和耐腐蚀性研究

摘要 本文介绍了使用具有良好增韧性能的合成环氧封端聚丁二烯 (ETPB) 树脂改性的环氧体系的耐腐蚀性和耐磨性。研究了这种改性对所得改性涂层的硬度、磨损、热和腐蚀保护性能的影响。摆锤硬度试验表明，ETPB掺入环氧树脂基体增加了系统的阻尼能。Taber 实验表明，橡胶改性提高了环氧涂层的耐磨性。样品的热重分析 (TGA) 表明，ETPB 改性环氧树脂涂层的耐热性与纯涂层的耐热性几乎相同。使用电化学阻抗谱 (EIS) 在 3.5% 氯化钠溶液中对橡胶改性和未改性环氧涂料的防腐性能进行了为期 90 天的研究。EIS 研究表明，两种涂层均保持完好，具有良好的耐腐蚀性能。未改性和 ETPB 改性环氧树脂涂层在浸泡 90 天后的膜电阻分别为 2.59 × 10 10 Ω cm 2 和 2.70 × 10 10 Ω cm 2 。在环氧树脂中加入疏水性丁二烯橡胶使水接触角从77°增加到85°。这种疏水性的增加降低了改性环氧涂料的吸水率。未改性和 ETPB 改性环氧树脂涂层在浸泡 90 天后的膜电阻分别为 2.59 × 10 10 Ω cm 2 和 2.70 × 10 10 Ω cm 2 。在环氧树脂中加入疏水性丁二烯橡胶使水接触角从77°增加到85°。这种疏水性的增加降低了改性环氧涂料的吸水率。未改性和 ETPB 改性环氧树脂涂层在浸泡 90 天后的膜电阻分别为 2.59 × 10 10 Ω cm 2 和 2.70 × 10 10 Ω cm 2 。在环氧树脂中加入疏水性丁二烯橡胶使水接触角从77°增加到85°。这种疏水性的增加降低了改性环氧涂料的吸水率。