Premium
Polystyrene/EVA melt blends compatibilized with EVA‐ graft ‐polystyrene
Author(s) -
Soares B. G.,
Barbosa R. V.,
Covas J. C.
Publication year - 1997
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/(sici)1097-4628(19970912)65:11<2141::aid-app10>3.0.co;2-6
Subject(s) - materials science , copolymer , polystyrene , polymer blend , composite material , ethylene vinyl acetate , izod impact strength test , polymer , elongation , polymer chemistry , scanning electron microscope , ultimate tensile strength
The influence of poly[(ethylene‐ co ‐vinyl acetate)‐ g ‐polystyrene] (EVA‐ g ‐PS) on the mechanical and morphological properties of polystyrene and the blends with EVA copolymers has been investigated. The melt blends have been performed in a twin‐screw extruder. The addition of the graft copolymer enhances the mechanical properties and impact resistance of the PS matrix and PS/EVA (90 : 10 wt %) blends. Better results on impact strength and elongation at break have been achieved by using a EVA‐ g ‐PS graft copolymer with a higher EVA proportion by weight. This graft copolymer also contains a lower molecular weight of the PS‐grafted segments than the PS matrix. Morphological studies by scanning electron microscopy revealed some interfacial adhesion between the components in the compatibilized polymer blends. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 2141–2149, 1997