Synthesis, characterization and in vitro oxidative stability of poly(3,3,3-trifluoropropyl)methylsiloxane modified polyurethaneurea

• Published in: Polymer degradation and stability Vol. 94; no. 2; pp. 259 - 266
• Main Authors: Liu, Cao, Hu, Chun Pu
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.02.2009; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Fluorinated polysiloxanes; Hydrogen bonding; Inorganic and organomineral polymers; Microphase separation; Oxidative stability; Physicochemistry of polymers; Polyurethaneurea elastomers; Preparation; Surface properties; Surface properties; Microphase separation; Polyurethaneurea elastomers; Fluorinated polysiloxanes; Oxidative stability; Hydrogen bonding; Fluorine containing copolymer; Property composition relationship; Fluorine containing polymer; Mechanical properties; Thermoplastic rubber; Hydrophobicity; Urea copolymer; Experimental study; Urethane copolymer; Polyaddition; Tensile strength; Polyurethane elastomer; Oxidation resistance; Preparation; Chemical properties; Siloxane copolymer; Siloxane polymer
• ISSN: 0141-3910; 1873-2321
• DOI: 10.1016/j.polymdegradstab.2008.10.022

A series of α,ω-bis(3-hydroxypropyl)-poly[(3,3,3-trifluoropropyl)methylsiloxane] (FPS) with different molecular weights were synthesized and characterized, then the FPS modified polyurethaneurea (FSPUU) elastomers were further synthesized with poly(tetramethylene glycol)/FPS as soft segments and 4,4′-diphenylmethane diisocyanate/ethylene diamine as hard segments. The surface properties of the FSPUU films were measured. It was found that the surface hydrophobicity of these FSPUU films was enhanced with increasing the molecular weight of FPS, due to the enrichment of FPS segments at the surface region. Oxidative stability of the FSPUU films was examined in vitro by immersing the films with 200 μm thickness in oxidative solution (H 2O 2/CoCl 2) for 21 days. The experimental results showed that the degree of degradation of all FSPUU films was lower than that of polydimethylsiloxane modified polyurethaneurea (MSPUU), and the oxidative stability of these FSPUU films was fair enhanced with increasing the molecular weight of FPS, which could be attributed to the lowering of swelling ratios in H 2O and 20% H 2O 2, as well as the permeation rate of H 2O in FSPUU films. Furthermore, the tensile strength of all FSPUU films is higher than that of MSPUU film.