Abstract:
In this paper，the epoxy phosphate ester resin（EPER） was obtained bycovalent bond grafting of diethyl phosphate（DPA）and epoxy resins，which was used as the matrix resin to prepare the cured varnish coating. The composition，construction，glass transition temperature of EPER，and the interior morphology，mechanical properties，and anti-corrosion properties of cured coating were characterized by FT-IR， 1H NMR，XPS，DSC，SEM，and EIS. The DPA content and epoxy value on the intrinsic properties of the cured coatingwere studied systematically. The results showed that the modified EDPA increased themechanical properties of the cured coating on one hand，and on the other hand enhanced the corrosion resistance of the cured coating due to the chelation of phosphate and metallic ions， which made it possible to be applied in the field of metal protection.
Key words:
epoxy phosphate ester resins；chemical modification；mechanical property；corrosion resistance
摘要： 通过共价键的连接，将磷酸二乙酯（DPA）与环氧树脂（EPR）反应以制备环氧磷酸酯，并将环氧磷酸酯作为基体树脂制备了清漆固化涂层。利用傅立叶变换红外光谱（FT-IR）、核磁共振氢谱（1H NMR）、X射线光电子能谱（XPS）、差示扫描量热仪（DSC）、扫描电子显微镜（SEM）及电化学交流阻抗（EIS）等，对环氧磷酸酯的组成、结构、玻璃化转变温度，以及固化涂层的内部形貌、力学性能和耐腐蚀性进行了研究。重点分析了 DPA的添加量以及不同环氧值的 EPR对环氧磷酸酯本征性质的影响。结果表明：相对于纯环氧树脂，经改性的环氧磷酸酯一方面提高了固化清漆涂层的力学性能，另一方面磷酸根离子对金属离子的螯合作用，可更加有效提高固化涂层的耐腐蚀性，为其在金属防腐领域的应用提供了可行性。
关键词:
环氧磷酸酯,
化学改性,
力学性能,
腐蚀防护
CLC Number:
ZHAO N, HU Z W, CHEN Y J, et al. Research on the Preparation of Epoxy Phosphate Ester Resins and Their Application in the Field of Metal Corrosion Protection[J]. Paint & Coatings Industry, 2023, 53(6): 30-38.
赵宁, 胡振文, 陈于健, 等. 环氧磷酸酯的制备及其在金属防护领域的应用研究[J]. 涂料工业, 2023, 53(6): 30-38.