Elastomers based on the polyphosphazene skeletal platform are the subject of broad interest from both biomedical and technological viewpoints. Here, we describe a fourth generation of polyphosphazene elastomers with both 2,2,2-trifluoroethoxy (CF₃CH₂O−) and nonfluorinated alkoxy groups such as CH₃CH₂O–, CH₃CH₂CH₂O–, or CH₃CH₂CH₂CH₂O– units. These structures provided access to elastomers with very low glass transition temperatures in the range of −60 to −90 °C. Variations in the relative percentages of the alkoxy and trifluoroethoxy side groups have a significant influence on the physical properties, which were studied by stress–strain, differential scanning calorimetry, and thermogravimetric analysis techniques. Biomedical materials focused on cardiovascular and dental applications are target applications.

中文翻译：

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具有烷氧基和三氟乙氧基侧基的聚磷腈弹性体

从生物医学和技术角度来看，基于聚磷腈骨架平台的弹性体都是引起广泛关注的主题。在这里，我们描述了具有2,2,2-三氟乙氧基（CF ₃ CH ₂ O-）和非氟化烷氧基（例如CH ₃ CH ₂ O–，CH ₃ CH ₂ CH ₂ O–或通道₃通道₂通道₂通道₂O –单位。这些结构提供了在-60至-90°C范围内具有非常低的玻璃化转变温度的弹性体的通道。烷氧基和三氟乙氧基侧基的相对百分比的变化对物理性能有重要影响，已通过应力应变，差示扫描量热法和热重分析技术进行了研究。专注于心血管和牙科应用的生物医学材料是目标应用。