TY - JOUR
T1 - Shear-rate dependence of first normal stress difference of poly(isoprene-b-styrene) in solution near the order-disorder transition temperature
AU - Takahashi, Yoshiaki
AU - Noda, Masahiro
AU - Ochiai, Nobuo
AU - Noda, Ichiro
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1996
Y1 - 1996
N2 - Viscoelastic properties of poly(isoprene-b-styrene) in dioctylphthalate under steady shear flow were measured near the order-disorder transition temperature. In ordered states, first normal stress difference N1 is proportional to shear rate γ̇ at low γ̇ region, but becomes proportional to γ̇2 at the high γ̇ region, similar to the N1 behaviour of polymer blends undergoing shear-induced homogenization. Because the existence of microdomains was confirmed at the high γ̇ region by the flow birefringence method, it is concluded that the above N1 behaviour is not caused by shear-induced homogenization, but is probably caused by the shear-induced alignment of the microdomain structure.
AB - Viscoelastic properties of poly(isoprene-b-styrene) in dioctylphthalate under steady shear flow were measured near the order-disorder transition temperature. In ordered states, first normal stress difference N1 is proportional to shear rate γ̇ at low γ̇ region, but becomes proportional to γ̇2 at the high γ̇ region, similar to the N1 behaviour of polymer blends undergoing shear-induced homogenization. Because the existence of microdomains was confirmed at the high γ̇ region by the flow birefringence method, it is concluded that the above N1 behaviour is not caused by shear-induced homogenization, but is probably caused by the shear-induced alignment of the microdomain structure.
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U2 - 10.1016/S0032-3861(96)00602-7
DO - 10.1016/S0032-3861(96)00602-7
M3 - Article
AN - SCOPUS:0030394012
VL - 37
SP - 5943
EP - 5945
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 26
ER -