Abstract Bio-based Non-Isocyanate Polyurethanes (NIPUs) were synthesized by bulk polyaddition of diamine with carbonated sunflower oil (CSFO). Carbonated vegetable oils were obtained by solvent-free mixture reaction of CO2 with epoxidized sunflower oil under the conditions (120 °C, 50 bar) and characterized by FTIR, 1H NMR, and 13C NMR. Finally, the effect of the amine structure as well as CSFO/amine molar ratio (1:0.75, 1:1 and 1:2) on mechanical, and chemical properties NIPU’s were studied by using curing agents EDA (1,2-ethylenediamine), DETA (Diethyltriamine) and IPDA (Isophorone diamine). Except for IPDA based NIPU, it was seen that along with urethane formation, the amine group also reacted with ester groups to form amides. IPDA and EDA showed good thermal, mechanical, chemical and anticorrosive properties. Furthermore, DETA based NIPU displayed high elongation at break. These results highlight the potentiality of this environmentally friendly approach to prepare renewable NIPU materials for surface coatings purpose.

中文翻译：

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葵花油基聚氨酯非异氰酸酯无溶剂无催化剂合成及其涂料性能

摘要 通过二胺与碳酸葵花油（CSFO）的本体加聚反应合成了生物基非异氰酸酯聚氨酯（NIPU）。碳酸植物油是通过 CO2 与环氧化葵花油在 120 °C, 50 bar 条件下的无溶剂混合反应获得的，并通过 FTIR、1H NMR 和 13C NMR 进行表征。最后，通过使用固化剂 EDA（1,2-乙二胺）研究了胺结构以及 CSFO/胺摩尔比（1:0.75、1:1 和 1:2）对 NIPU 的机械和化学性能的影响、DETA（二乙基三胺）和IPDA（异佛尔酮二胺）。除了基于 IPDA 的 NIPU，可以看到随着氨基甲酸酯的形成，胺基也与酯基反应形成酰胺。IPDA 和 EDA 表现出良好的热、机械、化学和防腐性能。此外，基于 DETA 的 NIPU 显示出高断裂伸长率。这些结果突出了这种环保方法在制备用于表面涂层目的的可再生 NIPU 材料方面的潜力。