Role of montmorillonite in flame retardancy of ethylene-vinyl acetate copolymer

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Abstract

The effects of non-treated (MMT), organophilic (OMM), and olefin/silicone polymer intercalated (IMM) montmorillonites on the thermal stability of ethylene-vinyl acetate copolymer (EVA) and on the flammability of magnesium hydroxide filled EVA were studied. The influence of various treatments on the delamination of montmorillonites in EVA was detected by rheological measurements and by Raman microscopy. The latter was a unique method for rapid detection of the dispersion also in highly filled EVA. Enhancement of thermo-oxidative stability of EVA and flame-retarded EVA could be observed by thermal analysis in the presence of variously treated montmorillonites. The flame-retardant efficiency of magnesium hydroxide was improved by simultaneous application of MMT and IMM. The increased performance of magnesium hydroxide was explained by the rheological effect of the IMM, catalytic effect of MMT and chemical interactions of montmorillonites with the metal hydroxide.

Original languageEnglish
Pages (from-to)593-599
Number of pages7
JournalPolymer Degradation and Stability
Volume91
Issue number3
DOIs
Publication statusPublished - Mar 1 2006

Keywords

  • Fire retardancy
  • Hydrated filler
  • Interface modification
  • Nanocomposite
  • Rheology
  • Thermal degradation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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