Get access

Comparison of olefin copolymers as compatibilizers for polypropylene and high-density polyethylene

Authors

  • Yijian Lin,

    1. Department of Macromolecular Science and Engineering, Center for Applied Polymer Research, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author
  • Victoria Yakovleva,

    1. Department of Macromolecular Science and Engineering, Center for Applied Polymer Research, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author
  • Hongyu Chen,

    1. New Products–Materials Science, Core R&D, The Dow Chemical Company, Freeport, Texas 77541
    Search for more papers by this author
  • Anne Hiltner,

    Corresponding author
    1. Department of Macromolecular Science and Engineering, Center for Applied Polymer Research, Case Western Reserve University, Cleveland, Ohio 44106-7202
    • Department of Macromolecular Science, Center for Applied Polymer Research, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author
  • Eric Baer

    1. Department of Macromolecular Science and Engineering, Center for Applied Polymer Research, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author

Abstract

Some polyolefin elastomers were compared as compatibilizers for blends of polypropylene (PP) with 30 wt % high-density polyethylene (HDPE). The compatibilizers included a multiblock ethylene–octene copolymer (OBC), two statistical ethylene–octene copolymers (EO), two propylene–ethylene copolymers (P/E), and a styrenic block copolymer (SBC). Examination of the blend morphology by AFM showed that the compatibilizer was preferentially located at the interface between the PP matrix and the dispersed HDPE particles. The brittle-to-ductile (BD) transition was determined from the temperature dependence of the blend toughness, which was taken as the area under the stress–strain curve. All the compatibilized blends had lower BD temperature than PP. However, the blend compatibilized with OBC had the best combination of low BD temperature and high toughness. Examination of the deformed blends by scanning electron microscopy revealed that in the best blends, the compatibilizer provided sufficient interfacial adhesion so that the HDPE domains were able to yield and draw along with the PP matrix. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

Ancillary