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Model filled polymers. XIV: Effect of modifications of filler composition on rheology
Author(s) -
Sun Liqing,
Aklonis J. J.,
Salovey R.
Publication year - 1993
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760332003
Subject(s) - materials science , composite material , rheology , dispersity , polystyrene , filler (materials) , polymer , particle (ecology) , polymer chemistry , oceanography , geology
Steady shear vxiscosity, dynamic moduli and the appearance of fracture surfaces of model composites, consisting of monodisperse crosslinked polymeric spheres of varied composition in a polymethyl‐methacrylate matrix, depend on the compatibility of filler particle and matrix. After intensive mixing, “compatible” systems form uniform and stable dispersions. Filler particles cluster in incompatible composites producing a highly non‐Newtonian response. At 40 w% filler, yield behavior results, with a yield stress of 3100 Pa for polystyrene particles and 1900 Pa for copolystyrene‐acetoxystyrene particles. The flow properties of compositionally complex particles from seeding are determined by particle surface composition.