Abstract In order to obtain waterborne two-component polyurethane (WB 2K-PUR) with good mechanical properties as well as excellent corrosion resistance, a series of hydroxyl-based polyurethane (HO-WPU) were synthesized using isophorone diisocyanate (IPDI), dimethylolpropionic acid (DMPA), and different proportions of polyether polyol (PTMEG) and polyester polyol (P1012) in this paper. Then WB 2K-PUR coatings were prepared with water-dispersible isocyanates (WDPI) as curing agent. The influence of the proportion of polyester polyols and polyether polyols in soft segments on coatings properties was studied. The characteristics of the coatings were analyzed by Fourier transform infrared spectroscopy (ATR-IR), contact angle, differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and atomic force microscopy (AFM). The results showed that the mechanical properties and corrosion resistance of polyester and polyether polyols with appropriate proportion are improved significantly. The mechanism tended to be that with the addition of polyester, more hydrogen bonds were formed between the molecules, which increased the compactness of the coating as a physical crosslinking point. However, the ester groups have a strong affinity to water molecules, so the hydrophilicity of the coating was increased by excessive polyester polyols, and the shielding effect on the corrosion medium was reduced. With the inclusion of 40 % (g/g) P1012 in polyols, the coating has satisfied comprehensive properties.

中文翻译：

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聚醚/聚酯多元醇比对水性双组分聚氨酯涂料性能的影响

摘要 为获得具有良好机械性能和优异耐腐蚀性能的水性双组分聚氨酯（WB 2K-PUR），以异佛尔酮二异氰酸酯（IPDI）、二羟甲基丙酸为原料合成了一系列羟基聚氨酯（HO-WPU）。 (DMPA)，以及本文中不同比例的聚醚多元醇 (PTMEG) 和聚酯多元醇 (P1012)。然后以水分散性异氰酸酯 (WDPI) 作为固化剂制备 WB 2K-PUR 涂料。研究了聚酯多元醇和聚醚多元醇在软链段中的比例对涂料性能的影响。通过傅里叶变换红外光谱（ATR-IR）、接触角、差示扫描量热法（DSC）、动态机械热分析（DMTA）和原子力显微镜（AFM）分析涂层的特性。结果表明，适当比例的聚酯和聚醚多元醇的力学性能和耐腐蚀性能得到显着提高。其机理往往是随着聚酯的加入，分子之间形成了更多的氢键，这增加了涂层作为物理交联点的致密性。但酯基团对水分子有很强的亲和力，因此过多的聚酯多元醇增加了涂层的亲水性，降低了对腐蚀介质的屏蔽作用。多元醇中P1012含量为40%(g/g)，涂层综合性能令人满意。其机理往往是随着聚酯的加入，分子之间形成了更多的氢键，这增加了涂层作为物理交联点的致密性。但酯基团对水分子有很强的亲和力，因此过多的聚酯多元醇增加了涂层的亲水性，降低了对腐蚀介质的屏蔽作用。由于多元醇中含有40%(g/g)P1012，涂层具有令人满意的综合性能。其机理往往是随着聚酯的加入，分子之间形成了更多的氢键，这增加了涂层作为物理交联点的致密性。但酯基团对水分子有很强的亲和力，因此过多的聚酯多元醇增加了涂层的亲水性，降低了对腐蚀介质的屏蔽作用。多元醇中P1012含量为40%(g/g)，涂层综合性能令人满意。降低了对腐蚀介质的屏蔽作用。多元醇中P1012含量为40%(g/g)，涂层综合性能令人满意。降低了对腐蚀介质的屏蔽作用。多元醇中P1012含量为40%(g/g)，涂层综合性能令人满意。