Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Poly(ethylene terephthalate)(PET) Nanocomposites Filled with Fumed Silicas by Melt Compounding

  • Chung, Su-Chul (Department of Textile and Polymer Engineering, College of Engineering, Hanyang University) ;
  • Hahm, Wan-Gyu (Department of Textile and Polymer Engineering, College of Engineering, Hanyang University) ;
  • Im, Seung-Soon (Department of Textile and Polymer Engineering, College of Engineering, Hanyang University) ;
  • Oh, Seong-Geun (Department of Chemical Engineering, College of Engineering, Hanyang University)
  • Published : 2002.08.01
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Abstract

PET nanocomposites filled with fumed silicas were prepared via direct melt compounding method at various mixing conditions such as filler type and filler content. Some fumed silicas were pre-treated to improve the wettability and dispersibility, and principal characterizations were performed to investigate the effects of nano fumed silicas on polymer matrix. Hydrophobic fumed silica (M-FS), which has the similar contact angles of water with neat PET, acted as the best reinforcement for the thermal stability and mechanical properties of PET nanocomposite, and FE-SEM images also showed that M-FS was uniformly dispersed into matrix and had good wettability. But, some filler (O-FS) had low dispersibility and caused the deterioration of mechanical properties. Besides, the results of DSC revealed the nucleation effect of all fillers in polymer matrix, and PET nanocomposite filled with hydroptilic fumed silica (FS) showed markedly the characteristic dynamic rheological properties such as shear thinning behavior at very low frequencies and the decrease of viscosity.

Keywords

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