Premium
Effect of blending on the rheological properties of polystyrene
Author(s) -
Harris Everette K.
Publication year - 1973
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.1973.070170604
Subject(s) - shear rate , polystyrene , rheology , materials science , shear (geology) , shear stress , thermodynamics , apparent viscosity , viscosity , polymer , composite material , polymer chemistry , physics
Experimental non‐Newtonian viscosity, primary normal stress difference, complex viscosity, and shear stress relaxation were taken for highly fractionated polystyrene in Aroclor 1248 (a chlorinated biphenyl) as well as for blends differing in molecular weight and concentration. The data are described by three parameters: a zero‐shear rate value, the slope of the log–log plots in the high shear rate region, and a time constant defined as the inverse of the shear rate at the intersection of the low and high shear rate asymptotes. For the functions measured, the low shear rate region is characterized by a dependence on M w and the high shear rate region by a dependence on M n . Implications to polymer processing are discussed.