Influence of a Reactive Organoclay on Polymerization and Properties of Polyurethane Nanocomposites |
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Authors: | Mojtaba Fereidoonnia Mehdi Barikani |
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Affiliation: | Iran Polymer and Petrochemical Institute , Tehran, Iran |
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Abstract: | In this study, segmented polyurethane/clay nanocomposites were prepared via in situ intercalative polymerization of polyether polyol mixed nanoclay with toluene diisocyanate, followed by chain extending with 1,4-butanediol. The reactive prepolymer tended to gel by increasing the clay content from 0.4 to 1.5 wt.%. This unusual phenomenon was found to be caused by a catalytic effect of quaternary ammonium intercalant on the organoclay. The procedure used for intercalated nanocomposites, is confirmed by wide angle X-ray diffraction studies. Thermogravimetric analysis results demonstrated a very good increase in onset degradation temperature by adding only 0.8 wt.% of organoclay. |
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Keywords: | Intercalative polymerization Isocyanurate cross-linking Nanocomposites Polyurethanes |
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