Organoclay nanocomposites from ethylene-acrylic acid copolymers

Francesco Paolo La Mantia, Nadka Tzankova Dintcheva, Cristina Marazzato, Liliya Minkova, Sara Filippi, Pierluigi Magagnini

Risultato della ricerca: Article

30 Citazioni (Scopus)

Abstract

A study of the structure–property relationships for nanocomposites prepared by melt compounding from ethylene–acrylic acid copolymers of varied composition and molecular architecture, and organoclays modified with different ammonium ions has been made by DSC, POM, SEM, TEM, WAXD, and rheological and mechanical tests. Within the series of clays investigated, the best levels of dispersion were displayed by those organically modified with quaternary ammonium ions containing two long alkyl tails. The relevant nanocomposites were shown to possess mixed exfoliated and intercalated morphology. The spacing of the intercalated clay stacks, most of which comprise few silicate layers, was found to be independent of clay loading, in the range of 2–50 phr, and to change with the molecular architecture of the matrix polymer. An indication that the excesssurfactant present in some of the clays, and the organic material added in others to expand the interlayer spacing, were expelled from the clay galleries during melt blending and acted as plasticisers for the matrix polymer, was obtained from WAXD and rheological characterisations.
Lingua originaleEnglish
pagine (da-a)1208-1225
RivistaMacromolecular Materials and Engineering
Volume291
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1500.1500???
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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