Mechanical and rheological properties of the maleated polypropylene-layered silicate nanocomposites with different morphology

Chong Min Koo, Mi Jung Kim, Min Ho Choi, Sang Ouk Kim, In Jae Chung

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

Three types of maleated polypropylene-layered silicate nanocomposites with different dispersion states of layered silicate (deintercalated, intercalated, and exfoliated states) are prepared from two kinds of polypropylenes with different molecular weights, organically modified layered silicate and pristine montmorillonite to investigate the effect of the final morphology of the nanocomposite on the rheological and mechanical properties. Maleated polypropylene with high molecular weight intercalates slowly and the other with low molecular weight exfoliates fast into the organophilic layered silicates. Rheological properties such as oscillatory storage modulus, nonterminal behavior, and relative viscosity has close relationship with the dispersion state of layered silicates. The exfoliated nanocomposite shows the largest increase and the deintercalated nanocomposite shows almost no change in relative shear and complex viscosities with the clay content. The exfoliated nano-composite shows the largest drop in complex viscosity due to shear alignment of clay layers in the shear flow. In addition, the final dispersion state of layered silicates intimately relates to the mechanical property. The dynamic storage moduli of nanocomposites show the same behavior as the relative shear and complex viscosities.

Original languageEnglish
Pages (from-to)1526-1535
Number of pages10
JournalJournal of Applied Polymer Science
Volume88
Issue number6
DOIs
Publication statusPublished - 2003 May 9
Externally publishedYes

Keywords

  • Morphology
  • Nanocomposites
  • Rheology

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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