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Study of elastomeric polyurethane nanocomposites prepared from grafted organic–montmorillonite

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Abstract

4,4′-Diphenylmethane diisocyanate (MDI) was grafted on to organic–montmorillonite (OMMT) by reaction between hydroxyl groups (−OH) on surface of the montmorillonite and the isocyanate groups (−NCO) of MDI, thus forming grafted organic–montmorillonite (MOMMT). Intercalated nanocomposites based on polyurethane (PU) and MOMMT were prepared by solution intercalation technology. The interface interaction of PU/MOMMT nanocomposites was better than that of PU/MMT composites. The tensile strength, elongation at break, and tear strength of the PU/MOMMT nanocomposites increased for MOMMT content up to 5% w/w, and then decreased with further increase in MOMMT content. At the same filler content, the tensile strength and tear strength of PU/MOMMT nanocomposites were higher than those of PU/OMMT nanocomposites, whereas the elongations at break of PU/MOMMT nanocomposites were smaller than those of PU/OMMT nanocomposites. The initial temperatures of weight loss of PU/MOMMT nanocomposites were lower than for PU/MMT composites in the first step of thermal degradation, whereas in the second step initial temperatures of weight loss were higher for PU/MOMMT nanocomposites.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China

    Aimin Cheng, Shishan Wu & Jian Shen

  2. Nanjing Julong Engineering Plastics Co. Ltd., Nanjing, 210061, People’s Republic of China

    Dingjun Jiang & Fen Wu

  3. College of Chemistry and Environment Science, Nanjing Normal University, Nanjing, 210097, People’s Republic of China

    Jian Shen

Authors
  1. Aimin Cheng
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  2. Shishan Wu
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  3. Dingjun Jiang
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  4. Fen Wu
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  5. Jian Shen
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Correspondence to Shishan Wu.

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Cheng, A., Wu, S., Jiang, D. et al. Study of elastomeric polyurethane nanocomposites prepared from grafted organic–montmorillonite. Colloid Polym Sci 284, 1057–1061 (2006). https://doi.org/10.1007/s00396-006-1476-9

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  • DOI: https://doi.org/10.1007/s00396-006-1476-9

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