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Morphological origin of super toughness in poly(ethylene terephthalate)/polyethylene blends
Author(s) -
Carté Theresa L.,
Moet Abdelsamie
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070480405
Subject(s) - materials science , compatibilization , ethylene , toughness , maleic anhydride , polyethylene terephthalate , polyethylene , elongation , styrene , composite material , copolymer , polymer blend , morphology (biology) , poly ethylene , polymer chemistry , polymer , ultimate tensile strength , chemistry , organic chemistry , catalysis , genetics , biology
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.