Reactive compatibilization of polystyrene/poly(ethylene–co–vinyl acetate) (EVA) blends

Authors

  • Bluma G. Soares,

    Corresponding author
    1. Macromolecular Institute, Federal University of Rio de Janeiro Centro de Tecnologia, Bloco J, Ilha do Fundão, 21945–970, Rio de Janeiro, RJ, Brazil
    • Macromolecular Institute, Federal University of Rio de Janeiro Centro de Tecnologia, Bloco J, Ilha do Fundão, 21945–970, Rio de Janeiro, RJ, Brazil
    Search for more papers by this author
  • Francisco O. Cario Jr.

    1. Macromolecular Institute, Federal University of Rio de Janeiro Centro de Tecnologia, Bloco J, Ilha do Fundão, 21945–970, Rio de Janeiro, RJ, Brazil
    Search for more papers by this author

Abstract

A reactive compatibilizer, mercapto-functionalized EVA (EVASH), in combination with styrene-butadiene block copolymer (SBS), was used to compatibilize the blends of polystyrene (PS) and ethylene–vinyl acetate copolymer (EVA). The reactive compatibilization was confirmed by the presence of insoluble material and from dynamic-mechanical analysis. In addition to a more uniform morphology with small phase size, the compatibilization also provided excellent stabilization of the morphology, with an almost complete suppression of coarsening during annealing. As a consequence, a substantial increase on the elongation at break without significant influence on ultimate tensile strength was achieved for compatibilized blends with different compositions. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 14–22, 2006

Ancillary