Abstract In this work, eugenol/stearylamine-based benzoxazine (E-s) and pyrogallol/furfurylamine-based benzoxazine (PY-f) were synthesized from renewable raw materials and mixed to prepare a series of copolymers. The curing behavior of E-s/PY-f mixtures were characterized by differential scanning calorimetry (DSC). The result shows that the curing temperature decreased obviously with the increase of PY-f content. When the mass ratio of E-s to PY-f was 8:2, the exothermic peak temperature (Tp) of the sample (EP20) dropped to 194 ℃, which was 70 ℃ lower than that of E-s. Then, the representative copolymerization mechanism of E-s and PY-f was proposed. Furthermore, EP20 was adopted to prepare the copolymer coating (PEP) on mild steel (MS) for anti-corrosion application. The results of electrochemical impedance spectroscopy (EIS) indicated that PEP-coated MS well kept its corrosion resistance after being immersed in 3.5 wt% NaCl aqueous solution for 30 days. Hence, the bio-based benzoxazines copolymer is promising for preparing superior anti-corrosion material with lower curing temperature.

中文翻译：

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丁香酚基苯并恶嗪共聚物：低固化温度和增强的耐腐蚀性

摘要 在这项工作中，丁香酚/硬脂胺基苯并恶嗪（Es）和连苯三酚/糠胺基苯并恶嗪（PY-f）以可再生原料合成并混合制备了一系列共聚物。Es/PY-f 混合物的固化行为通过差示扫描量热法 (DSC) 表征。结果表明，随着PY-f含量的增加，固化温度明显降低。当Es与PY-f的质量比为8:2时，样品(EP20)的放热峰温度(Tp)降至194 ℃，比Es低70 ℃。然后，提出了Es和PY-f的代表性共聚机理。此外，采用 EP20 在低碳钢 (MS) 上制备共聚物涂层 (PEP) 以用于防腐应用。电化学阻抗谱 (EIS) 结果表明，PEP 涂层 MS 在浸入 3.5 wt% NaCl 水溶液 30 天后仍能很好地保持其耐腐蚀性。因此，生物基苯并恶嗪共聚物有望用于制备具有较低固化温度的优异​​防腐材料。