Transient Viscosity of Polymer Solutions after Stepwise Change of Shear Rates

Yoshiaki Takahashi, Ichiro Noda, Mitsuru Nagasawa, Yoshinobu Isom

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Transient shear stresses in linear polystyrene solutions after stepwise change of shear rate from a steady shear rate * 1to a higher or a lower values of * 2 were observed using a Weissenberg rheogoniometer type R-17. The initial parts of stress development curves after stepwise increase of shear rate from constant * 2to different *i compose a single line independent of *2. The initial parts of stress relaxation curves relative to the first steady state also compose a single line independent of * 2if * 1is kept constant. It was concluded that the original quasi-network structure of polymer solutions have a stability and in the case of stepwise increase of shear rate the original structure is ruptured when a certain critical strain is accumulated in the solution. It was also concluded that the initial slopes become lower with increasing *ureflecting decrease of the effective entanglement density with increasing * 1.

Original languageEnglish
Pages (from-to)132-135
Number of pages4
JournalNihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)
Volume14
Issue number3
DOIs
Publication statusPublished - Jan 1 1986
Externally publishedYes

Fingerprint

Polymer solutions
Shear deformation
Viscosity
viscosity
shear
polymers
Polystyrenes
stress relaxation
Stress relaxation
curves
shear stress
Shear stress
polystyrene
slopes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Transient Viscosity of Polymer Solutions after Stepwise Change of Shear Rates. / Takahashi, Yoshiaki; Noda, Ichiro; Nagasawa, Mitsuru; Isom, Yoshinobu.

In: Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan), Vol. 14, No. 3, 01.01.1986, p. 132-135.

Research output: Contribution to journalArticle

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