Melt-extensional properties and orientation behaviors of polypropylene-layered silicate nanocomposites

Chong Min Koo, Jong Hyun Kim, K. I.Hyun Wang, I. N.Jae Chung

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Polypropylene-layered silicate nanocomposites consisting of three components-pure polypropylene, maleated polypropylene, and organically modified silicate-were prepared by the melt-intercalation method to investigate melt-extensional properties such as melt strength, neck-in test, and orientation behavior. The nanocomposites showed an enhanced tensile modulus, enhanced storage modulus, much enhanced melt tension, and reduced neck-in during the melt processing as compared with neat polymer. The uniaxial drawing induced the silicate surface to align parallel to the sheet surface. The c and a* axes of the polypropylene crystals were bimodally oriented to the flow direction, and the b axes were oriented to the thickness direction. The bimodal orientation of the polypropylene crystal was enhanced with the concentration of silicates.

Original languageEnglish
Pages (from-to)158-167
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume43
Issue number2
DOIs
Publication statusPublished - 2005 Jan 15
Externally publishedYes

Keywords

  • Clay
  • Melt tension
  • Nanocomposites
  • Neck-in test
  • Orientation
  • Poly(propylene) (PP)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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