Many twin screw extruders are operated in the starve‐fed mode with the majority of the extruder having partially‐filled channels. There will always be regions of totally filled channels due to the presence of the die or reverse elements. The authors experimentally show the effect of the change of percent drag flow on the rate of distributive mixing in the co‐rotating and counter‐rotating twin screw extruder. Optimum operating conditions for distributive mixing are identified experimentally and verifi…
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