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On the characterization of non‐newtonian flow. II
Author(s) -
Sabia Raffaele
Publication year - 1964
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.1964.070080303
Subject(s) - rheology , quantum entanglement , shear rate , newtonian fluid , non newtonian fluid , shear stress , viscosity , generalized newtonian fluid , polymer , materials science , apparent viscosity , shear (geology) , shear viscosity , shear flow , molar mass distribution , thermodynamics , composite material , physics , quantum mechanics , quantum
A new rheological method for the determination of the molecular weight distribution of polymers was developed using the critical viscosity for entanglement together with the Newtonian viscosity and the apparent viscosity at a shear stress in the non‐Newtonian region. Alternately, two shear stresses in the non‐Newtonian region may be used. It was established that the critical molecular weight for entanglement is independent of the shear stress but dependent on the shear rate.