Novel polyether polyurethane/clay nanocomposites synthesized with organicly modified montmorillonite as chain extenders

Authors

  • Ping Ni,

    1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
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  • Quanlin Wang,

    1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
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  • Jing Li,

    1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
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  • Jishuan Suo,

    Corresponding author
    1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
    • State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
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  • Shuben Li

    1. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, The Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract

A kind of novel polyether polyurethane (PU)/clay nanocomposite was synthesized using poly(tetramethylene glycol), 4,4′-diphenylmethane diisocyanate (MDI), 1,6-hexamethylenediamine, and modified Na+-montmorillonite (MMT). Here, organicly modified MMT (O-MMT) was formed by applying 1,6-hexamethylenediamine as a swelling agent to treat the Na+-MMT. The X-ray analysis showed that exfoliation occurred for the higher O-MMT content (40 wt %) in the polymer matrix. The mechanical analysis indicated that, when the O-MMT was used as a chain extender to replace a part of the 1,2-diaminopropane to form PU/clay nanocomposites, the strength and strain at break of the polymer was enhanced when increasing the content of O-MMT in the matrix. When the O-MMT content reached about 5%, the tensile strength and elongation at break were over 2 times that of the pure PU. The thermal stability and the glass transition of the O-MMT/PU nanocomposites also increased with increasing O-MMT content. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 6–13, 2006

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