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Mixing studies in the single screw extruder
Author(s) -
Bigio D. I.,
Boyd J. D.,
Erwin L.,
Gailus D. W.
Publication year - 1985
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760250510
Subject(s) - mixing (physics) , materials science , plastics extrusion , viscosity , laminar flow , composite material , silicone rubber , mooney viscosity , viscosity index , silicone , mechanics , polymer , scanning electron microscope , base oil , physics , quantum mechanics , copolymer
Laminar mixing in a single screw extruder between two miscible liquids is considered. Studies are presented which examine the mixing performance in single screw extruders with mixing sections, variable geometry screws, and multi‐viscosity mixtures. Model extruders, set up on engine lathes, were used to mix colored silicone rubber which eventually cured in the screw channel. The cured silicone was then removed and sliced to measure the mixing. Results show mixing as a function of both down channel location and total average strain. For the mixing section study, results support the theory of interfacial area reorientation as the key mechanism in mixing section performance. Increasing viscosity ratio for the multi‐viscosity study showed a decrease in mixing rate.