两亲性
聚合物
高分子化学
溶解度
乙二醇
材料科学
二甘醇
乙醚
接触角
化学工程
润湿
化学
有机化学
复合材料
共聚物
工程类
作者
Maria Kober,Bengt Wesslén
标识
DOI:10.1002/pola.1992.080300611
摘要
Abstract Amphiphilic segmented polyetherurethanes were prepared from methylene diphenylene diisocyanate (MDI), poly(ethylene glycol) 1500 (PEG), and a fatty acid monoglyceride as a chain extender. The polymers were not soluble in water or methanol, but dissolved readily in organic solvents. The amphiphilic properties were demonstrated as a large hysteresis in the water contact angles, exceeding 110°. The amphiphilic polymers were shown to modify the surface properties of a poly(ether urethane) (PEU) and a poly(ether urethane urea) (PEUU) when added in 1–10 wt %, presumably due to migration of the additive to the surface. The surfaces of particularly the PEU blends became highly amphiphilic, exhibiting contact angles hystereses up to 90–100°. A surface saturation effect was observed at 5% added amphiphilic polymer. A difference in the behavior of PEU and PEUU was ascribed to differences in solubility of the additive in the matrix. On long‐term exposure to water the PEUU blends increased their amphiphilic behavior.
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