针对混凝土表面腐蚀防护问题,制备一种丙烯酸酯改性环氧树脂涂膜并测试其物化性能。通过对比实验确定改性环氧树脂最佳种类、含量、反应时间、反应温度、固化剂用量、固化时间,并以红外光谱表征其结构。利用铅笔硬度、附着力、吸水率、耐酸碱盐腐蚀测试比较涂膜物理性能和耐腐蚀性能。通过差示扫描量热分析和热重分析研究涂膜热性能。结果表明,随着接枝聚合反应温度提高、反应时间增加,双酚A型环氧树脂E20在115℃下接枝聚合反应6h,可保证反应体系有较高单体转化率和接枝率。随改性环氧树脂所占比例升高,以质量分数为35%的丙烯酸酯改性环氧树脂为成膜树脂,15%的改性多元胺为固化剂,固化反应40min所制涂膜较为稳定,具备优良的耐腐蚀性和机械强度。 Aiming at the corrosion protection of concrete surface, an acrylate modified epoxy resin coating was prepared and its physicochemical properties were tested. The best type, content, reaction time, reaction temperature, amount of curing agent, curing time and the structure of the modified epoxy resin were determined by comparative experiments. Using pencil hardness, adhesion, water absorption, acid and alkali corrosion test to compare the physical properties of the coating and corrosion resistance. The thermal properties of the coating were investigated by differential scanning calorimetry and thermogravimetric analysis. The results showed that with the increase of reaction temperature and reaction time, the bisphenol A epoxy resin E20 could be grafted at 115 ℃ for 6h, which could ensure high monomer conversion and graft ratio. With the proportion of modified epoxy resin increased to 35% by mass of acrylate-modified epoxy resin as a film-forming resin, 15% of the modified polyamine as a curing agent, the curing reaction 40min the coating is more Stable, with excellent corrosion resistance and mechanical strength.