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Polyethylene/clay nanocomposites prepared by polymerization compounding method.

Asmaa Gaboune1, Suprakas Sinha Ray, Abdellatif Ait-Kadi

  • 1Department of Chemical Engineering, Laval University, Sainte-Foy, Quebec GIK 7P4, Canada.

Journal of Nanoscience and Nanotechnology
|April 1, 2006
PubMed
Summary

A novel polymerization compounding technique creates high density polyethylene/clay nanocomposites. This method enhances material stiffness and strength, offering improved mechanical properties for advanced applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • High density polyethylene (HDPE) is a widely used thermoplastic.
  • Improving the mechanical properties of HDPE is crucial for expanding its applications.
  • Nanocomposites offer a promising route to enhance polymer performance.

Purpose of the Study:

  • To develop a new technique for preparing high density polyethylene/clay nanocomposites.
  • To investigate the structural and mechanical properties of the synthesized nanocomposite.
  • To evaluate the potential of the new method for creating advanced polymer materials.

Main Methods:

  • Chemical anchoring of Ziegler-Natta catalyst on organically modified clay.
  • Initiation of ethylene polymerization on the clay surface.
  • Incorporation of polyethylene-adsorbed clay into an HDPE matrix via batch mixing.

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  • Characterization using X-ray diffraction (XRD) and transmission electron microscopy (TEM).

    • Main Results:

    • Successful synthesis of an intercalated high density polyethylene/clay nanocomposite.
    • Demonstrated significant increases in stiffness (approx. 50%) and strength (approx. 20%) compared to neat HDPE.
    • Observed a 25% increase in storage modulus in the molten state for the nanocomposite.

    Conclusions:

    • The 'polymerization compounding' technique effectively produces high density polyethylene/clay nanocomposites.
    • The resulting nanocomposite exhibits significantly enhanced mechanical and dynamic mechanical properties.
    • This method provides a viable pathway for developing high-performance polymer nanocomposites.