Effects of the Extrusion Parameters of a Co-Rotating Twin Screw Extruder and their Interactions on the Properties of Carbon Black filled Styrene-Butadiene Rubber

摘要

The filler dispersion in a premixed compound prepared using an internal mixer was further improved by an intermeshing co-rotating twin screw extruder (TSE). The effects of the extrusion parameters (i.e., screw speed, barrel temperature and ribbon width) on the extrudate properties were investigated using response surface methodology (RSM). Significantly, the effect on the extrudate properties of any extrusion parameter depends on the level of the other parameters, called "interaction effect". Mooney viscosity can also be adjusted by simultaneously altering these extrusion parameters. RSM thus reveals a number of ways to adjust the extrudate properties in a minimised number of experiments.