Characterization of PP/Mg(OH)(2) and PP/Nanoclay Composites with Supercritical CO2 (scCO(2))

Taşdemir M. , Caneba ., Tıwarı R., Wang B.

POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, cilt.50, sa.10, ss.1064-1070, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Konu: 10
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1080/03602559.2011.557919
  • Sayfa Sayıları: ss.1064-1070


In this article, supercritical carbon dioxide (scCO(2)) is used to form a high density microcellular foam structure to reduce the polymer use and facilitate dispersion of Mg(OH)(2) and Nanoclay fillers. A twin-screw extruder system was used to predistribute the inorganic filler from the PP polymer, resulting composite PP/filler pellets. This followed by the use of a single-screw extruder wherein supercritical carbon dioxide is introduced in the formulation. Finally the resulting foam PP/filler/CO2 pellets are injection molded into test samples. The structure and properties of the composites are characterized using a scanning electron microscopy (SEM), Differential scanning calorimetry (DSC), and density measurements. Furthermore, PP/Clay/Mg(OH)(2) polymer composites are subjected to examinations to obtain their yield and tensile strengths, elasticity modulus, % elongation, Izod impact strength, hardness, Heat deflection temperature (HDT), Vicat softening point and Melt flow index (MFI).