Preparation, characterization, and properties of fluorinated polyurethanes

Abstract

Novel fluorinated polyurethanes (FPUs) were prepared by living radical polymerization of polyurethanes and hexafluorobutyl acrylate. The structures of the FPUs were characterized by FTIR, 1H NMR, GPC, DSC, and XPS. The fluorinated polyurethane polymerization was investigated and showed monomer conversion, and molecular weight increased with increasing reaction time. In this way, the fluorine content in polyurethane could be easily adjusted by controlling the content of the fluorinated acrylate monomer. The mechanical evaluation shows that FPUs exhibit good mechanical properties. Morphology of FPU films was observed by scanning electron spectroscopy. The effects of the fluorine content on the surface properties and oxidative stability of FPUs were investigated. FPUs films were devoid of significant surface degradation after immersion in 20% H2O2 and 0.1 M CoCl2 at 37 °C for 5 weeks. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 3248–3256, 2009

Syntheses and self-assembly of novel polyurethane–itaconic acid copolymer hydrogels

“…Recently, we demonstrated the synthesis of PU based on tetraphenyl-1,2-ethanediol to synthesize novel fluorinated polyurethanes (FPU) for biomedical applications [20]. The present work showed that novel PU-I copolymer hydrogels could also be synthesized by this method.…”

“…The mixture was heated to 60-70°C and allowed to react for 3 h. After 3 h, the temperature was reduced to 30°C, and stoichiometric amounts of tetraphenyl-1,2-ethanediol (TPE) (TPE was prepared according to a method described in a previous publication [20]) and 0.1% dibutyltindilaurate (DBTL) (based on the isocyanate content) were added Scheme 1. Synthesis of PU-I.…”

“…The process of radical polymerization of hydrophilic vinyl monomers with polymers (synthesized from iniferter) is called a macroiniferter radical polymerization. In a previous publication we used this method to successfully synthesize novel fluorinated polyurethanes (FPU) and showed their interesting biological and mechanical properties that merit potential applications as biomaterials for tissue engineering [20].…”

“…The polymerization is performed by the insertion of the monomer into the iniferter bond. The polymers obtained by an iniferter have a capacity to initiate the polymerization of hydrophilic vinyl monomers [19,20]. The process of radical polymerization of hydrophilic vinyl monomers with polymers (synthesized from iniferter) is called a macroiniferter radical polymerization.…”

Synthesis and characterization of X-ray opaque polycarbonate urethane: Effect of a dihalogenated chain extender on radiopacity and hemocompatibility

“…This is consistent with findings of other authors who worked with fluorine containing polymers. [59][60][61] TGA was carried out to find out the thermal processing window of the PUs synthesized. In order to make components out of biomaterials they have to be heated, melted and shaped using polymer processing machines.…”