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Interfacial rheology of uniform polymer dispersions
Author(s) -
Wang S. Q.,
Inn Y. W.
Publication year - 1995
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1995.210370301
Subject(s) - materials science , rheology , polymer , silane , composite material , dispersion (optics) , shear stress , siloxane , viscosity , slip (aerodynamics) , suspension (topology) , shear (geology) , shear flow , thermodynamics , optics , physics , mathematics , homotopy , pure mathematics
Abstract The effects of high oscillatory shear on the viscosity of a model polymer dispersion of solid particles was investigated. A dispersion of glass beads in poly(dimethyl siloxane) (PDMS) is uniform and free of any agglomeration. When sheared at low stress levels, the dispersion remains uniform. At high stresses under oscillatory shear, two processes can take place. One is spatial ordering (threading) of the spherical beads that does not occur in steady shear. The other is molecular interfacial slip due to high interfacial stress in samples containing fluoro‐silane treated glass beads, leading to a lower suspension viscosity than that of samples containing bare non‐treated beads.