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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and properties study of waterborne polyurethane synthesized by mixing polyester diols and isocyanates
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Preparation and properties study of waterborne polyurethane synthesized by mixing polyester diols and isocyanates

机译：用聚酯二醇和异氰酸酯合成水性聚氨酯的制备及性能研究

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摘要

In view of environmental protection requirements, it is an inevitable trend for waterborne coatings to replace traditional coatings. Waterborne polyurethane (WPU), a kind of typical resin used in coatings, has become a research hot topic of waterborne coatings because of its advantages, such as non-polluting, safe and reliable, excellent properties, good compatibility, and easy modification. In this article, solvent-free WPU is prepared by mixing 4,4 '-dicyclohexylmethane diisocyanate/ isophorone diisocyanate (HMDI/IPDI) and polycarbonate diol/ Polycaprolactone diol (PCDL/PCL). Through the comparison of the properties of the polymer, the best amount of raw materials was determined. Specifically, R = 1.35 (R is NCO/OH ratio), the content of dimethylolpropionic acid (DMPA) is 5.5%, the content of trimethylol propane (TMP) is 2.5%, the mole ratio of HMDI/IPDI is 2:1, the mole ratio of PCDL/PCL is 2:1, and the preeminent WPU shows the excellent thermal stability, the contact angle of 118.04 degrees, the hardness is H. The chemical structures and rough surface morphologies of the WPU films were characterized by FT-IR, TG, AFM, and SEM, respectively. Therefore, considering the film properties, and the low cost, simple, and green process, this research will offer the possibility of application of this free-solvent WPU in industrial production and large-scale application.
机译：鉴于环境保护要求，水性涂料取代传统涂料是一种不可避免的趋势。水性聚氨酯（WPU），一种涂料中使用的典型树脂，已成为水性涂料的研究热门话题，因为其优点，如非污染，安全可靠，优异的性能，良好的兼容性，易于修改。在本文中，通过混合4,4'-二环己基甲烷二异氰酸酯/异佛酮二异氰酸酯（HMDI / IPDI）和聚碳酸酯二醇/聚己内甲酰基二醇（PCDL / PCL）制备无溶剂WPU。通过比较聚合物的性质，测定最佳原料量。具体地，r = 1.35（R为NCO / OH比），二羟甲基丙酸（DMPA）的含量为5.5％，三羟甲基丙烷（TMP）的含量为2.5％，HMDI / IPDI的摩尔比为2：1， PCDL / PCL的摩尔比为2：1，并且卓越的WPU显示出优异的热稳定性，接触角为118.04度，硬度为H. WPU膜的化学结构和粗糙表面形态的特征是FT- IR，TG，AFM和SEM分别。因此，考虑到薄膜性能，以及低成本，简单，绿色的过程，本研究将提供这种自由溶剂WPU在工业生产和大规模应用中应用的可能性。

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