Abstract A novel waterborne polyurethane (PU), based on (-)-epigallocatechin-3-gallate (EGCG) that contains phenolic hydroxyl group, was successfully synthesized and characterized. The structural study of PU based on EGCG through FT-IR confirmed the incorporation of EGCG into the chain of PU. The results of X-ray diffraction (XRD) showed that the introduction of EGCG changed the crystallization behavior of the pure waterborne PU. Thermogravimetric analysis (TGA) results indicated that the PU samples exhibited improved thermal decomposition temperature. The degree of phase segregation of modified PU was confirmed by Scanning electron microscope (SEM) analysis. The physical and biodegradable properties of modified PU indicated a comprehensive performance.

中文翻译：

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表没食子儿茶素-3-没食子酸酯合成及表征水性聚氨酯的研究

摘要 以含酚羟基的(-)-表没食子儿茶素-3-没食子酸酯(EGCG)为基础，成功合成并表征了一种新型水性聚氨酯(PU)。基于 EGCG 的 PU 结构研究通过 FT-IR 证实了 EGCG 并入了 PU 链。X射线衍射(XRD)结果表明EGCG的引入改变了纯水性PU的结晶行为。热重分析 (TGA) 结果表明 PU 样品表现出改善的热分解温度。通过扫描电子显微镜（SEM）分析确认改性PU的相分离程度。改性聚氨酯的物理和生物降解性能表明其综合性能。