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Preparation and characterization of polyethylene (PE)/clay nanocomposites by in situ polymerization with vanadium-based intercalation catalyst

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Summary

Complete exfoliation of clay during vanadium-based Zigler-Natta polymerization of ethylene has been successfully carried out by using clay and MgCl2 hybrid supports. MgCl2 offers catalyst loading sites, and the vanadium catalyst is avoided directly anchoring in the surface of the clay, so intercalation catalyst clay/MgCl2/VOCl3displays high activity for ethylene polymerization. Exfoliated PE/clay nanocomposites are confirmed by X-ray diffraction (XRD), and transmission electron microscopy (TEM). Strong interaction between the dispersed clay particles and the polymer matrices provides good thermal and mechanical properties. Compared with pure PE, all these nanocomposites show enhancement of the melting temperature (Tm) and the thermal decomposition temperatures. Additionally, the incorporation of clay into the PE matrix significantly improves the mechanical properties of these nanocomposites. The increased tensile strength has been observed in the range of 3.4 to 7.9 MPa. The tensile moduli of the PE/clay nanocomposite are 23.4%-45.3% higher than that of the pure PE.

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Authors and Affiliations

  1. Department of Chemical and Biomolecular Engineering & Center for Ultramicrochemical Process Systems (CUPS), Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, 305-701, Yuseong-gu, Daejeon, Republic of Korea

    Liqiang Cui & Seong Ihl Woo

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  1. Liqiang Cui
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  2. Seong Ihl Woo
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Correspondence to Seong Ihl Woo.

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Cui, L., Woo, S.I. Preparation and characterization of polyethylene (PE)/clay nanocomposites by in situ polymerization with vanadium-based intercalation catalyst . Polym. Bull. 61, 453–460 (2008). https://doi.org/10.1007/s00289-008-0975-x

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  • DOI: https://doi.org/10.1007/s00289-008-0975-x

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