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

✍ Scribed by Tao Zhang; Kai Xi; Hong Chen; Xuehai Yu

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
106 KB
Volume
91
Category
Article
ISSN
0021-8995

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✦ Synopsis

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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