Nonquiescent relaxation in entangled polymer liquids after step shear.
Large step shear experiments revealed through particle tracking velocimetry that entangled polymeric liquids display either internal macroscopic movements upon shear cessation or rupturelike behavior during shear. Visible inhomogeneous motions were detected in five samples with the number of entanglements per chain ranging from 20 to 130 at amplitudes of step strain as low as 135%.
Wang
Shi-Qing
SQ
Department of Polymer Science and Maurice Morton Institute of Polymer Science, University of Akron, Akron, Ohio 44325, USA. swang@uakron.edu
Ravindranath
Sham
S
Boukany
Pouyan
P
Olechnowicz
Michael
M
Quirk
Roderic P
RP
Halasa
Adel
A
Mays
Jimmy
J