Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
권호 표지

Rheological Behavior of Polymer/Layered Silicate Nanocomposites under Uniaxial Extensional Flow

  • Park Jun-Uk (School of Chemical Engineering, Seoul National University) ;
  • Kim Jeong-Lim (School of Chemical Engineering, Seoul National University) ;
  • Kim Do-Hoon (School of Chemical Engineering, Seoul National University) ;
  • Ahn Kyung-Hyun (School of Chemical Engineering, Seoul National University) ;
  • Lee Seung-Jong (School of Chemical Engineering, Seoul National University) ;
  • Cho Kwang-Soo (Department of Polymer Science, Kyungpook National University)
  • Published : 2006.06.01
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Abstract

We investigated the rheological behaviors and orientation of three different types of layered silicate composite systems under external flow: microcomposite, intercalated and exfoliated nanocomposites. Rheological measurements under shear and uniaxial extensional flows, two-dimensional, small-angle X-ray scattering and transmission electron microscopy were conducted to investigate the properties, as well as nano- and micro-structural changes, of polymer/layered silicate nanocomposites. The preferred orientation of the silicate layers to the flow direction was observed under uniaxial extensional flow for both intercalated and exfoliated systems, while the strain hardening behavior was observed only in the exfoliated systems. The degree of compatibility between the polymer matrix and clay determined the microstructure of polymer/clay composites, strain hardening behavior and spatial orientation of the clays under extensional flow.

Keywords

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