Get access

Morphological origin of super toughness in poly(ethylene terephthalate)/polyethylene blends

Authors

  • Theresa L. Carté,

    1. Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author
  • Abdelsamie Moet

    Corresponding author
    1. Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106-7202
    • Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106-7202
    Search for more papers by this author

Abstract

A compatibilization strategy for poly(ethylene terephthalate) (PET) and polyethylene (PE) blends to achieve high toughness is described. Maleic anhydride functionalized styrene–ethylene–butylene–styrene (MA-g-SEBS) block copolymer at 20 pph was found to produce an intricate multidomain morphology in which the two major components (50% PE, 50% PET) and the compatibilizer coexist on a hierarchal order. A portion of the PET was dispersed as interconnected rodlike domains oriented along the injection direction. The rest of the PET and the PE constituted beadlike nano domains which served as the matrix. The blend at all these morphological levels responded to deformation in a cooperative fashion giving rise to a super tough material. That is, a blend whose elongation at break (600%) was superior to its two major components (90% for PET and 300% for PE). © 1993 John Wiley & Sons, Inc.

Get access to the full text of this article

Ancillary