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Synthesis and properties of self-crosslinkable polyurethane–urea with silsesquioxane formation

Authors

  • Tao Zhang,

    1. College of Life Science, Nanjing University, Nanjing 210093, China
    2. Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, China
    3. Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China
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  • Kai Xi,

    1. Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, China
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  • Hong Chen,

    1. Department of Chemical Engineering, McMaster University, Hamiton, Ontario, Canada
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  • Xuehai Yu

    Corresponding author
    1. Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, China
    • Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, China
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Abstract

Based on the typical two-step polyurethane–urea synthesis, a new series of self-crosslinkable polyurethane (PU)–urea formulations, consisting of poly(tetramethylene oxide) and 4,4′-diphenyl methane diisocyanate, and extended by ethylenediamine (EDA)/aminoethylaminopropyltrimethyoxysilane (AEAPS), were prepared. FTIR, ESCA, WAXD, DSC, and mechanical properties of samples were recorded. The results show that the self-crosslinkable polyurethane–urea could be crosslinked by hydrolysis of the trimethyloxysiloxane group to form the silsesquioxane structure. These structures represent a kind of nanosize, cagelike, chemical crosslink site as well as filler, which affect the properties of PU. The morphology, varied with different ratios of EDA/AEAPS, was also discussed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 190–195, 2004

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