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- W1979848395 abstract "A series of organic−inorganic hybrid coatings from hyperbranched polyurethanes (HBPU) were prepared using hyperbranched polyester and 3-aminopropyltriethoxysilane. Initially, isocyanate terminated HBPU prepolymers were synthesized from hyperbranched polyesters [prepared by the reaction of 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) with pentaerythritol, TMP, or glycerol as core moiety] with isophorone diisocyanate at NCO/OH ratio of 1.6:1 for 5 h at 70−80 °C. The partial excess NCO content of this prepolymer was reacted with 3-aminopropyltriethoxysilane in different concentrations. The remaining excess NCO completely reacted with atmospheric moisture. Fourier transform infrared (FTIR) spectroscopy was used for the structural analysis of HBPU hybrid coatings. Deconvolution of the FTIR spectra using Origin 6.0 software through Gaussian curve-fitting method was used to find out the changes and types of intermolecular H-bonding interactions in the hybrid films with the variation in concentration of sol−gel precursors added. The viscoelastic properties of the synthesized coatings were determined by dynamic mechanical thermal analysis (DMTA)." @default.
- W1979848395 created "2016-06-24" @default.
- W1979848395 creator A5085525874 @default.
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- W1979848395 date "2007-08-24" @default.
- W1979848395 modified "2023-10-16" @default.
- W1979848395 title "Synthesis and Characterization of Hyperbranched Polyurethane−Urea/Silica Based Hybrid Coatings" @default.
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- W1979848395 doi "https://doi.org/10.1021/ie0703181" @default.
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