AbstractThe desire to develop a sustainable society has recently inspired polymer chemists to explore functional polyurethane materials because of their versatile material shape and thermoplasticity. To develop further functionalities of polyurethane materials and manipulation methods, here, we report the synthesis and a new method for coating non-ionic polyurethanes containing sulfonyl groups with utilizing electrophoretic deposition. The polyurethanes were synthesized via polyaddition of methylenediphenyl 4,4′-diisocyanate (MDI) with 2,2′-thiodiethanol in the absence or presence of triethylene glycol (TEG) as the soft ternary segment of the polymer, followed by oxone oxidation. The electrophoretic behaviors of the polyurethanes toward a stainless-steel electrode were investigated, and the peeling resistance and scratch resistance of a polyurethane film coated on a plate were evaluated by cross-cut adhesion and pencil hardness tests, respectively. These tests revealed that incorporation of soft TEG segments at an appropriate fraction can enhance both peeling resistance and scratch resistance. We also tested the enhancement in the transparency of the coated films, which do not lose their favorable peeling resistance and scratch resistance in the process, by replacing the aromatic diisocyanate component (MDI) with an alicyclic diisocyanate, dicyclohexylmethane 4,4′-diisocyanate (HMDI).A new manipulation technique of polyurethane materials via electrophoretic deposition (EPD) is proposed. Polyurethanes with sulfonyl groups are synthesized for the EPD coatings on a stainless-steel electrode plate at the anode side selectively. The coating properties, including peeling resistance, scratch resistance, and transparency, are improved by optimizing soft segment fraction and also by reducing aromaticity of the polyurethanes.

中文翻译：

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用于电泳沉积涂层的含砜非离子聚氨酯的合成

摘要 发展可持续社会的愿望最近激发了高分子化学家探索功能性聚氨酯材料，因为它们具有多功能的材料形状和热塑性。为了开发聚氨酯材料的进一步功能和操作方法，在这里，我们报告了利用电泳沉积涂覆含有磺酰基的非离子聚氨酯的合成和新方法。在不存在或存在三甘醇 (TEG) 作为聚合物的软三元链段的情况下，通过亚甲基二苯基 4,4'-二异氰酸酯 (MDI) 与 2,2'-硫代二乙醇的加聚反应合成聚氨酯，然后进行 oxone 氧化。研究了聚氨酯对不锈钢电极的电泳行为，并分别通过划格附着力和铅笔硬度测试来评价涂在板材上的聚氨酯薄膜的抗剥离性和抗划伤性。这些测试表明，以适当的比例掺入软 TEG 链段可以提高抗剥离性和抗划伤性。我们还测试了通过用脂环族二异氰酸酯、二环己基甲烷 4,4'-二异氰酸酯代替芳族二异氰酸酯组分 (MDI)，涂层薄膜透明度的增强，在此过程中不会失去其良好的耐剥离性和耐刮擦性。 HMDI。提出了一种新的聚氨酯材料电泳沉积（EPD）操作技术。具有磺酰基的聚氨酯被选择性地合成用于阳极侧不锈钢电极板上的 EPD 涂层。