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Extensional flow of mica‐filled polyethylene
Author(s) -
Utracki L. A.,
Lara J.
Publication year - 1984
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750050109
Subject(s) - materials science , rheometer , mica , composite material , extensional definition , polyethylene , viscosity , strain rate , extensional viscosity , shear (geology) , deformation (meteorology) , flow (mathematics) , rheology , shear viscosity , mechanics , paleontology , physics , biology , tectonics
Extensional flow of mica‐filled high density polyethylene was studied at 150°C in a Rheometrics elongational rheometer. The constant strain‐rate mode at a rate of 10 −3 to 1.0 s −1 , and the constant stress mode were used. The mica content was 0, 25, 40, and 60 weight percent. In both testing modes, the steady state elongational viscosities were obtained; those for the filled samples were about ten to twenty times larger than the shear viscosity at corresponding (low) rates of deformation.