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首页> 外文期刊>Journal of Applied Polymer Science >Influence of fluorine-containing side chain on the properties of waterborne polyurethane-urea
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Influence of fluorine-containing side chain on the properties of waterborne polyurethane-urea

机译：含氟侧链对水性聚氨酯 - 尿素性能的影响

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摘要

In order to prepare waterborne polyurethane with excellent water resistance and thermodynamic properties, a series of side chain fluorinated waterborne polyurethane-urea (FWPU-UA) was synthesized with polytetramethylene ether glycol, N-(2-methyl-1,3-propanediol-2 '-)-perfluoro-1-butanesulfonyl amine (NPBA), isophorone diisocyanate, and isophoronediamine. With the increase of NPBA content, the weight loss temperature, glass transition temperature, and tensile strength of FWPU-UA were all improved. Gaussian fitting analysis of infrared data and density functional theory simulation proved that the introduction of fluorine side chains increased the interaction of hydrogen bonding in the FWPU-UA. X-ray photoelectron spectroscopy analysis indicated that the aggregation of fluorine atoms on the surface of film were caused by the migration and enrichment of fluorine side chains. Furthermore, the water resistance of polyurethane-urea film could be significantly improved by adding a small amount of NPBA, and the seven-day water absorption rate of polyurethane-urea film was reduced from 30.13% to 12.55%.
机译：为了制备具有优良耐水性和热力学性能的水性聚氨酯，以聚四乙醚乙二醇、N-（2-甲基-1,3-丙二醇-2'-）-全氟-1-丁磺酰胺（NPBA）、异佛尔酮二异氰酸酯和异佛尔酮二胺为原料，合成了一系列侧链含氟水性聚氨酯脲（FWPU-UA）。随着NPBA含量的增加，FWPU-UA的失重温度、玻璃化转变温度和拉伸强度都有所提高。红外数据的高斯拟合分析和密度泛函理论模拟证明，氟侧链的引入增加了FWPU-UA中氢键的相互作用。X射线光电子能谱分析表明，氟原子在薄膜表面的聚集是由氟侧链的迁移和富集引起的。此外，添加少量NPBA可以显著提高聚氨酯脲膜的耐水性，七天吸水率从30.13%降低到12.55%。

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