Shear-rate dependence of first normal stress difference of poly(isoprene-b-styrene) in solution near the order-disorder transition temperature

Yoshiaki Takahashi; Masahiro Noda; Nobuo Ochiai; Ichiro Noda

doi:10.1016/S0032-3861(96)00602-7

Shear-rate dependence of first normal stress difference of poly(isoprene-b-styrene) in solution near the order-disorder transition temperature

Yoshiaki Takahashi, Masahiro Noda, Nobuo Ochiai, Ichiro Noda

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	5943-5945
Number of pages	3
Journal	polymer
Volume	37
Issue number	26
DOIs	https://doi.org/10.1016/S0032-3861(96)00602-7
Publication status	Published - Jan 1 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/S0032-3861(96)00602-7

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@article{04342c0b12774b979fc2e16aa300909b,

title = "Shear-rate dependence of first normal stress difference of poly(isoprene-b-styrene) in solution near the order-disorder transition temperature",

abstract = "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 {\.γ} at low {\.γ} region, but becomes proportional to {\.γ}2 at the high {\.γ} region, similar to the N1 behaviour of polymer blends undergoing shear-induced homogenization. Because the existence of microdomains was confirmed at the high {\.γ} 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.",

author = "Yoshiaki Takahashi and Masahiro Noda and Nobuo Ochiai and Ichiro Noda",

year = "1996",

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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

PY - 1996/1/1

Y1 - 1996/1/1

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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