Effect of novel aliphatic fluoro‐diol content on synthesis and properties of waterborne polyurethanes

ABSTRACT This study synthesized a waterborne polyurethane (WPU) prepolymer by using polytetramethylene glycol, isophorone diisocyanate, and 2,2,3,3,4,4,4‐Heptafluoro‐butynic acid 2,2‐bis‐hydroxymethyl‐butyl ester (HFBA). Subsequently, a series of novel HFBA/WPUs were synthesized by adopting ethylenediamine as the chain extender. The results from Fourier transform infrared spectroscopy demonstrated that the CO groups of HFBA/WPUs shifted to lower wavenumbers as the HFBA content increased. Moreover, when the HFBA content of the synthesized HFBA/WPUs increased, the WPU initial decomposition temperature, glass transition temperature, tensile strength, and Young's modulus also increased. Furthermore, the results of atomic force microscopy identified a relatively high number of humpy protrusions and roughness levels in the HFBA/WPUs with a relatively high HFBA content, causing higher hydrophobicity of these HFBA/WPUs. Furthermore, in vitro platelet and erythrocyte adhesion experiments revealed that increasing the HFBA content lowered platelet and erythrocyte adhesion on the surface of the WPUs. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47356. SEM micrographs of erythrocyte adhesion for HFBA/WPU‐03.