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Normal stress and viscosity measurements for polymer solutions in steady cone‐and‐plate shear
Author(s) -
Williams Michael C.
Publication year - 1965
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690110320
Subject(s) - extrapolation , viscosity , shear stress , viscoelasticity , materials science , shear modulus , polymer , newtonian fluid , stress (linguistics) , mechanics , shear (geology) , inertial frame of reference , thermodynamics , composite material , classical mechanics , physics , mathematics , mathematical analysis , linguistics , philosophy
Abstract Normal stress and viscometric measurements were made on nine polymer solutions with cone‐and‐plate instruments. Temperature, concentration, molecular weight, and chemical structure were varied. Zero‐shear viscosities, obtained by extrapolation of falling‐sphere data, ranged from 0.7 to 380 poise. A brief description is given of a normal stress‐measurement apparatus, incorporating fast‐response strain gauge pressure transducers. Measurements were made at shear rates between 5 and 2,800 sec. −1 , sometimes necessitating a considerable correction for inertial forces. Non‐Newtonian viscosity, normal stress, recoverable shear strain, and elastic modulus are presented in terms of modified Ferry reduced variables.