Analysis of the normal stress extruder

Paul A. Good, Arthur J. Schwartz, Chris Macosko

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A theoretical and experimental investigation of the pumping characteristics of the normal stress extruder was made. The theoretical model requires only material property data and extruder dimensions and rotation speed to evaluate the main velocity field, flow rate, and pressure. The flow from the extruder was measured for two viscoelastic polymer solutions and a polymer melt as a function of gap setting and angular velocity. These measurements were in reasonable agreement with the proposed model.

Original languageEnglish (US)
Pages (from-to)67-73
Number of pages7
JournalAIChE Journal
Issue number1
StatePublished - Jan 1974


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