Impact Modification of PA-6 and PBT by Epoxy-Functionalized Rubbers

Emiliano Lievana, József Karger-Kocsis

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17 Citations (Scopus)


Glycidylmethacrylate (GMA) grafted apolar (ethylene/propylene/diene -EPDM) and polar (acrylonitrile/butadiene - NBR) rubbers were melt blended with polyamide-6 (PA-6) and polybutylene terephthalate (PBT). The toughness of the blends containing 5, 10 and 50 wt.% epoxy functionalized rubbers was assessed by various methods (notched Charpy, perforation impact) as a function of temperature (T=23 and -40 °C). The notched Charpy tests served to deduce the fracture toughness (Kc) and energy (Gc) data. It was established that EPDM-g-GMA is a slightly better impact modifier than is NBR-g-GMA albeit the latter polar rubber is more compatible with both matrices than the less polar EPDM-g-GMA. This finding was traced to the difference in the glass transition temperature (Tg of NBR is higher than that of EPDM) and to the dispersion of the epoxy funtionalized rubbers.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalMacromolecular Symposia
Publication statusPublished - Sep 1 2003



  • EPDM
  • Epoxy functionalization
  • Grafting
  • NBR
  • PA-6
  • PBT
  • Toughness

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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