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Measurements of residence time distribution for the peroxide degradation of polypropylene in a single‐screw plasticating extruder
Author(s) -
Tzoganakis C.,
Tang Y.,
Vlachopoulos J.,
Hamielec A. E.
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070370308
Subject(s) - plastics extrusion , residence time distribution , polypropylene , materials science , peroxide , residence time (fluid dynamics) , degradation (telecommunications) , composite material , extrusion , chemistry , mineralogy , organic chemistry , electrical engineering , inclusion (mineral) , geotechnical engineering , engineering
Measurements of the residence time distribution (RTD) in a single‐screw plasticating extruder were carried out during experimental studies of the peroxide‐initiated controlled chemical degradation of polypropylene (PP). A radioactive tracer method was employed, and the effect of screw speed, temperature, and reaction on the RTD was examined. An increase of the peroxide concentration resulted in a broader distribution whereas an increase of the extrusion temperature was found to result in a narrower distribution. Use of low screw speeds simply increased the time delay through the extruder without affecting considerably the breadth of distribution. Results obtained from the present experiments were compared with several theoretical models.