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- W2022287710 abstract "New fluoro-modified thermoplastic polyurethanes containing perfluoropolyether (PFPE) blocks were synthesized by the reaction of a fluorinated macrodiol with a hydrogenated prepolymer based on poly(tetramethylene glycol) and 4,4′-methylene-bis-phenylisocyanate, followed by subsequent chain extension with 1,4-n-butanediol. This multistep bulk process opened the way for a new family of polymeric materials whose tensile properties appear to be excellent and unchanged in comparison with the corresponding unmodified hydrogenated polymers. Dynamic mechanical analysis and differential scanning calorimetry revealed peculiar characteristics. These polymers showed an unusual multiphase structure in which not only the hard and the hydrogenated soft segments were self-organized, but also a second soft phase, constituted by the PFPE segments, was present. Moreover, an easier hard-phase segregation and self-organization were observed, as was evidenced by the higher melting temperatures of the semicrystalline phase. This unique characteristic combined with a selective enrichment of PFPE segments to the surface, as indicated by the unusually low coefficient of friction data and superior chemical resistance. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2279–2294, 2003" @default.
- W2022287710 created "2016-06-24" @default.
- W2022287710 creator A5003281517 @default.
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- W2022287710 date "2003-01-21" @default.
- W2022287710 modified "2023-09-27" @default.
- W2022287710 title "New fluoro-modified thermoplastic polyurethanes" @default.
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- W2022287710 doi "https://doi.org/10.1002/app.11691" @default.
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