Abstract

In this investigation, a sample of epoxy resin was modified with different weight ratios (2, 5, 10, 15, and 20%) of a benzoxazine and thermally cured to form films; EB₀₂, EB₀₅, EB₁₀, EB₁₅, and EB₂₀, respectively. The curing reaction of the benzoxazine molecules and epoxy prepolymer was monitored by the Fourier transform infrared (FTIR) spectroscopic analysis. The examination of anticorrosion performances of the individual films by the method of electrochemical impedance spectroscopy (EIS), was achieved by, respectively, coating the films on stainless steel (SS) substrates. The water absorption behavior of the individual films also was examined by water sorption (WS) analysis. The water intake of the tested modified-epoxy resin shows a linear dependence on the amount of polybenzoxazine in each of the samples. Better coating performances are seen, from the EIS results of modified epoxy films in comparison to the pure epoxy resin. However, the EB20 shows outstanding corrosion prevention property with excellent hydrophobicity.

摘要

在这项研究中，用不同重量比（2％，5％，10％，15％和20％）的苯并恶嗪改性环氧树脂样品，并进行热固化以形成薄膜；EB ₀₂，EB ₀₅，EB ₁₀，EB ₁₅和EB ₂₀， 分别。苯并恶嗪分子与环氧预聚物的固化反应通过傅立叶变换红外光谱（FTIR）进行光谱分析。通过电化学阻抗谱（EIS）方法检查单个膜的防腐性能是通过分别在不锈钢（SS）基底上涂覆膜来实现的。还通过吸水（WS）分析检查了各个膜的吸水行为。所测试的改性环氧树脂的进水量与每个样品中聚苯并恶嗪的量呈线性关系。与纯环氧树脂相比，从改性环氧树脂薄膜的EIS结果可以看出，涂层性能更好。但是，EB20具有出色的防腐蚀性能和出色的疏水性。