Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Melt Rheology of Ethylene 1-Octene Copolymer Blends Synthesized by Ziegler-Natta and Metallocene Catalysts

  • Kim, Hak-Lim (Departnent of Chemical Engineering, Institute of Polymer Science and Engineering, Inha University) ;
  • Dipak Rana (Departnent of Chemical Engineering, Institute of Polymer Science and Engineering, Inha University) ;
  • Hanjin Kwag (Departnent of Chemical Engineering, Institute of Polymer Science and Engineering, Inha University) ;
  • Soonja Choe (Departnent of Chemical Engineering, Institute of Polymer Science and Engineering, Inha University)
  • Published : 2000.02.01
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Abstract

The melt rheology of four binary blends of ethylene 1-octene copolymers (EOCs) which consist of one component by Ziegler-Natta and another by metallocene catalysts, was studied to elucidate miscibility in the melt by using torsion rheometer at 200$\^{C}$ and different shear rates. The four blend systems, designated into the FA+FM, SF+FM, RF+EN, and RF+PL blend, are divided and interpreted based on the melt index (MI), the density and the comonomer contents. The melt viscosity such asη', η", and η$\^$*/ is weight average value if the comonomer contents are similar, otherwise they show different manner. The experimental resole are analyzed based on the Cole-Cole plot of logη' uersus log η", the logarithmic plots of the dynamic storage modulus (G') versus the dynamic loss modulus (G") for various blend compositions, and the melt viscosity of 11', n", and f" as a function of blend compositions. As a cerise-quence, the FA+FM blend is miscible, but the SF+FM, RF+EN, and RF+PL blends are not in the melt. Thus miscibility of the blends studied in this communication is suggested to strongly influence by the comonomer contents rather than the density or the MI.

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