Role of a compatibilizer in the structure and micromechanical properties of recycled poly(ethylene terephthalate)/polyolefin blends with clay

Authors

  • A. Hellati,

    1. Laboratoire des Matériaux Polymériques Multiphasiques, Department of Process Engineering, Faculty of Engineering, Ferhat Abbas University, Sétif 19000, Algeria
    Search for more papers by this author
  • D. Benachour,

    1. Laboratoire des Matériaux Polymériques Multiphasiques, Department of Process Engineering, Faculty of Engineering, Ferhat Abbas University, Sétif 19000, Algeria
    Search for more papers by this author
  • M. E. Cagiao,

    1. Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Serrano 119, Madrid 28006, Spain
    Search for more papers by this author
  • S. Boufassa,

    1. Department of Process Engineering, Faculty of Engineering, Ferhat Abbas University, Sétif 19000, Algeria
    Search for more papers by this author
  • F. J. Baltá Calleja

    Corresponding author
    1. Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Serrano 119, Madrid 28006, Spain
    • Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Serrano 119, Madrid 28006, Spain
    Search for more papers by this author

Abstract

The comparison of the degree of crystallinity and the micromechanical properties in the blends of recycled amorphous poly(ethylene terephthalate) (PET) with isotactic polypropylene (iPP) and high-density polyethylene (HDPE) with a compatibilizer in different proportions is reported. The physical study of the composites of the compatibilized blends and clay is also discussed. The analysis, performed by means of wide-angle X-ray scattering and differential scanning calorimetry techniques, permits us to describe, at microscale level, the role of the compatibilizer on the structure and microhardness of the polymer blends that we studied. The results reveal that PET was incompatible with both iPP and HDPE. However, the presence of the compatibilizer, a styrene–ethylene/butylene–styrene block copolymer grafted with maleic anhydride, allowed the compatibilization of these polymers. In the PET/iPP blends, the clay seemed to have a nucleating effect on the iPP and also induced a hardness increase in the compatibilized blends. On the other hand, in case of PET/HDPE, the crystallinity of these samples (pure blends, blends with compatibilizer, and blends with compatibilizer plus clay) only depended on their composition. Similarly to the PET/iPP blends, the addition of clay induced an increase in the hardness of the compatibilized blends. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

Ancillary