Polyphosphazene Elastomers with Alkoxy and Trifluoroethoxy Side Groups

Published on 2020-01-14T23:29:27Z (GMT) by
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 (CF<sub>3</sub>CH<sub>2</sub>O−) and nonfluorinated alkoxy groups such as CH<sub>3</sub>CH<sub>2</sub>O–, CH<sub>3</sub>CH<sub>2</sub>­CH<sub>2</sub>O–, or CH<sub>3</sub>CH<sub>2</sub>­CH<sub>2</sub>CH<sub>2</sub>O– 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.

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Li, Zhongjing; Chen, Chen; McCaffrey, Mitchell; Yang, Hui; Allcock, Harry R. (2020): Polyphosphazene Elastomers with Alkoxy and Trifluoroethoxy

Side Groups. ACS Publications. Collection. https://doi.org/10.1021/acsapm.9b00913