Extrusion with Carbon Dioxide (CO₂) and Characterization of ABS/Mg (OH)₂/Nanoclay Composites

In this paper, carbon dioxide (CO2) is used to form a high-density microcellular thermoplastic foam structure in order to reduce polymer consumption and facilitate dispersion of Mg (OH)2 and nanoclay fillers. A twin-screw extruder system was used to predistribute inorganic fillers into the ABS polymer, resulting in composite ABS/filler pellets. This is followed by the use of a single-screw extruder wherein supercritical carbon dioxide is...