Relaxation Times of Polymer Solutions in the Semidilute Region for Zero-Shear Viscosity

Yoshiaki Takahashi; Masanari Umeda; Ichiro Noda

doi:10.1021/ma00185a065

Relaxation Times of Polymer Solutions in the Semidilute Region for Zero-Shear Viscosity

Yoshiaki Takahashi, Masanari Umeda, Ichiro Noda

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

13 Citations (Scopus)

Abstract

Relaxation times τ_w and τ₀ of polymer solutions in the semidilute region for the zero-shear viscosity η⁰ were studied in good and θ solvents. Here, τ_w is the weight-average relaxation time evaluated from the product of η° and the steady-state compliance J_e, and τ₀ is the relaxation time specifying shear rate dependence of viscosity. It is found that τ₀ is proportional to τ_w regardless of concentration and solvent power, and the concentration and molecular weight dependences” of both relaxation times can be well understood if the semidilute region for η° Is divided into two regions, i.e., the dilute and entangled regions for J_e.

Original language	English
Pages (from-to)	2257-2262
Number of pages	6
Journal	Macromolecules
Volume	21
Issue number	7
DOIs	https://doi.org/10.1021/ma00185a065
Publication status	Published - Jul 1988
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma00185a065

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abstract = "Relaxation times τw and τ0 of polymer solutions in the semidilute region for the zero-shear viscosity η0 were studied in good and θ solvents. Here, τw is the weight-average relaxation time evaluated from the product of η° and the steady-state compliance Je, and τ0 is the relaxation time specifying shear rate dependence of viscosity. It is found that τ0 is proportional to τw regardless of concentration and solvent power, and the concentration and molecular weight dependences” of both relaxation times can be well understood if the semidilute region for η° Is divided into two regions, i.e., the dilute and entangled regions for Je.",

author = "Yoshiaki Takahashi and Masanari Umeda and Ichiro Noda",

year = "1988",

month = jul,

doi = "10.1021/ma00185a065",

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T1 - Relaxation Times of Polymer Solutions in the Semidilute Region for Zero-Shear Viscosity

AU - Takahashi, Yoshiaki

AU - Umeda, Masanari

AU - Noda, Ichiro

PY - 1988/7

Y1 - 1988/7

N2 - Relaxation times τw and τ0 of polymer solutions in the semidilute region for the zero-shear viscosity η0 were studied in good and θ solvents. Here, τw is the weight-average relaxation time evaluated from the product of η° and the steady-state compliance Je, and τ0 is the relaxation time specifying shear rate dependence of viscosity. It is found that τ0 is proportional to τw regardless of concentration and solvent power, and the concentration and molecular weight dependences” of both relaxation times can be well understood if the semidilute region for η° Is divided into two regions, i.e., the dilute and entangled regions for Je.

AB - Relaxation times τw and τ0 of polymer solutions in the semidilute region for the zero-shear viscosity η0 were studied in good and θ solvents. Here, τw is the weight-average relaxation time evaluated from the product of η° and the steady-state compliance Je, and τ0 is the relaxation time specifying shear rate dependence of viscosity. It is found that τ0 is proportional to τw regardless of concentration and solvent power, and the concentration and molecular weight dependences” of both relaxation times can be well understood if the semidilute region for η° Is divided into two regions, i.e., the dilute and entangled regions for Je.

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JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

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ER -

Relaxation Times of Polymer Solutions in the Semidilute Region for Zero-Shear Viscosity

Abstract

All Science Journal Classification (ASJC) codes

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