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首页> 外文期刊>Journal of Polymer Research >Nitrogen rich hyperbranched polyol via A_3+B_3 polycondensation: thermal, mechanical, anti-corrosive and antimicrobial properties of poly (urethane-urea)
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Nitrogen rich hyperbranched polyol via A_3+B_3 polycondensation: thermal, mechanical, anti-corrosive and antimicrobial properties of poly (urethane-urea)

机译：通过A_3 + B_3缩聚的富氮超支化多元醇：聚（氨基甲酸酯-尿素）的热，机械，抗腐蚀和抗菌性能

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摘要

High performance, high solid and low in volatile organic content (VOC) multifunctional coatings have wide applications in protection and decoration of materials. This work describes the synthesis of novel hyperbranched polymer (HBP) based polyurethanes (PUs) that exhibit antimicrobial property and are environmentally benign. Nitrogen rich HBP having nitrogen atom as a core was synthesized by A_3+B_3 polycondensation in two step reaction. In the first step, monomer A_3, a tricarboxylic acid, was synthesized by triethanolamine (B_3, the core) with succinic anhydride, while in the second step, monomers A_3 and B_3 were used to synthesize hyperbranched polyester polyol by polycondensation reaction. The HBP thus formed was reacted with 4,4′-methylenedicyclohexyl diisocyanate (H~(12) MDI) in varying ratios of NCO to OH to form NCO- terminated PU prepolymers in a self-catalyzed reaction. The prepolymers were then coated onto mild steel panels as well as tin foils and stored at ambient conditions for 20 days to evaluate the moisture-cured PU-urea film properties. The formation of tribasic acid (A_3), HBP and PU was confirmed by ~1H NMR, ~(13)C NMR, FTIR and ESI-mass spectroscopy. Thermal, mechanical, anti-corrosive and antimicrobial studies as well as the effect of varying NCO to OH ratio on these properties were investigated. The properties of PU-urea were found to be suitable for corrosion protection as well as biomedical and various other applications.
机译：高性能，高固含量和挥发性有机物含量低（VOC）的多功能涂料在材料的保护和装饰方面具有广泛的应用。这项工作描述了新型的基于超支化聚合物（HBP）的聚氨酯（PU）的合成，这些聚氨酯具有抗菌性能并且对环境无害。通过A_3 + B_3缩聚反应在两步反应中合成了以氮原子为核心的富氮HBP。第一步，由三乙醇胺（B_3，核）与琥珀酸酐合成单体A_3，即三羧酸，而在第二步中，单体A_3和B_3用于通过缩聚反应合成超支化聚酯多元醇。使如此形成的HBP与4,4'-亚甲基二环己基二异氰酸酯（H〜（12）MDI）以NCO与OH的不同比例反应，以在自催化反应中形成NCO封端的PU预聚物。然后将预聚物涂覆在软钢板和锡箔上，并在环境条件下保存20天，以评估湿固化的PU-脲膜的性能。通过〜1H NMR，〜（13）C NMR，FTIR和ESI-质谱确认了三元酸（A_3），HBP和PU的形成。研究了热，机械，防腐和抗菌研究，以及变化的NCO与OH比对这些性能的影响。发现PU-脲的性质适用于腐蚀防护以及生物医学和各种其他应用。

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