Investigation of the stiffness and yield behaviour of melt-intercalated poly(methyl methacrylate)/organoclay nanocomposites: Characterisation and modelling

R. Matadi, O. Gueguen, Said Ahzi, J. Gracio, R. Muller, D. Ruch

Research output: Contribution to journalArticle

16 Citations (Scopus)


The elastic modulus and yield stress behaviour of a melt intercalated Poly(methylmethacrylate)/ organoclay (PMMA/C30B and PMMA/C20A) were studied using uniaxial tensile tests at different temperatures and different strain rate. The stress-strain response was obtained for different loading rates and different test temperature. Both the stiffness and the yield stress were then clearly identified as function of strain rate and temperature. Our experimental results show that the yield stress and modulus of both PMMA/C20A and PMMA/C30B organoclay nanocomposites are very sensitive to clay concentration, strain rate and temperature. A micromechanically-based composite approach was used to predict the yield stress of both PMMA/C20A and PMMA/C30B organoclay nanocomposites. The results obtained from the model are in good agreement with our experimental results. As expected, the activation enthalpy of cooperative model increased slightly while the activation volume decreases slightly with the clay concentration.

Original languageEnglish
Pages (from-to)2956-2961
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number4
Publication statusPublished - Apr 2010
Externally publishedYes



  • Characterisation
  • Modelling
  • Organoclay
  • PMMA
  • Polymer nanocomposites
  • Yield behaviour

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

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