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合成了不同离子化程度的磺酸型阴离子聚氨酯离聚物,并通过红外光谱、示差扫描量热、动态力学、应力-应变等方法研究了它们的性能,结果表明:离子化程度不同对聚氨酯离聚物的软硬段相容性有较大的影响,引入少量离子,使软硬段相容性提高,引入大量离子时,则又使软硬段相分离程度提高,随着离子化程度的提高,材料的抗张强度、水溶性逐步提高,为控制聚氨酯材料的亲水性及制备水溶性聚氨酯提供了一种新途径。
The sulfonic acid anionic polyurethane ionomer with different degree of ionization was synthesized and their properties were studied by means of infrared spectroscopy, differential scanning calorimetry, dynamic mechanics, stress-strain and so on. The results showed that: The compatibility of soft and hard segments has a greater impact, the introduction of a small amount of ions, so that the hard and soft segments to improve the compatibility, the introduction of a large number of ions, then the soft and hard segment phase separation increased, with the degree of ionization increases, the material Tensile strength, water-soluble and gradually increase, to control the hydrophilicity of polyurethane materials and preparation of water-soluble polyurethane provides a new way.