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Viscometric properties of poly(dimethylsiloxane) filled with spherical silica particles
Author(s) -
Cantu T. S.,
Caruthers J. M.
Publication year - 1982
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.1982.070270830
Subject(s) - shear rate , materials science , volume fraction , rheology , dispersity , dimensionless quantity , shear stress , colloid , weissenberg number , viscosity , colloidal silica , shear (geology) , composite material , polymer chemistry , thermodynamics , chemistry , viscoelasticity , organic chemistry , physics , coating
The shear viscosity and primary normal stress coefficient were measured for colloidal dispersions of monodisperse silica spheres in poly(dimethylsiloxane). The viscometric properties of the dispersions were a function of the shear rate, particle diameter, and the volume fraction of particles. Dimensional analysis of rheological properties of colloidal dispersions of spherical particles in a second‐order fluid was performed, and the experimental data were analyzed in terms of the appropriate dimensionless groups. The reduced shear viscosity of the colloidal dispersions was a function of the volume fraction of particles and the reduced shear stress (or reduced shear rate). The reduced primary normal stress coefficient was a function of the volume fraction of particles, the reduced shear rate, and the Weissenberg number.