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On the rheological interpretation of die swell in molten polymers
Author(s) -
Han Chang Dae
Publication year - 1970
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.1970.070140711
Subject(s) - rheology , polymer , shearing (physics) , materials science , die swell , swell , die (integrated circuit) , flow (mathematics) , shear stress , thermodynamics , composite material , mechanics , physics , nanotechnology , extrusion
The reasons are given for the failure of the momentum method due to Metzner et al. to predict correct orders of magnitude in normal stress difference of polymer melts in simple shearing flow, and an expression is given for calculating the normal stress difference of polymer melts in steady fully‐developed flow from “exit pressure” measurements.