Extensional viscosity of polystyrene solutions in dilute region

Shinichi Kitade, Yoshiaki Takahashi, Ichiro Noda, Ming Long Yao

Research output: Contribution to journalArticle

Abstract

Extensional viscosities η e(ε•) of polystyrenes (PS) with high molecular weights in benzyl butyl phthalate (BBP; a good solvent for PS) and dioctyl phthalate (DOP; a θ solvent for PS) were studied in the dilute region for viscosity as a function of the extensional rate with an opposing jets extensional rheometer. The η e(ε•) data obtained with use of different orifice geometries agree with each other within experimental errors. The extensional viscosity at low ε• limit, η 0e is about three times larger than the corresponding zero - shear viscosity in accordance with Trouton's rule. In high ε• region, the extensional - thickening was observed for all the solutions. The critical extensional rate ε• * at which the η e(ε•) deviates from η 0e is confirmed to be related to the longest relaxation time of the solutions.

Original languageEnglish
Pages (from-to)99-105
Number of pages7
JournalNihon Reoroji Gakkaishi
Volume25
Issue number2
DOIs
Publication statusPublished - Jan 1 1997

Fingerprint

Polystyrenes
polystyrene
Viscosity
viscosity
phthalates
Diethylhexyl Phthalate
Shear viscosity
Rheometers
Orifices
Relaxation time
rheometers
orifices
Molecular weight
molecular weight
Geometry
relaxation time
shear
geometry

All Science Journal Classification (ASJC) codes

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

Cite this

Extensional viscosity of polystyrene solutions in dilute region. / Kitade, Shinichi; Takahashi, Yoshiaki; Noda, Ichiro; Yao, Ming Long.

In: Nihon Reoroji Gakkaishi, Vol. 25, No. 2, 01.01.1997, p. 99-105.

Research output: Contribution to journalArticle

Kitade, Shinichi ; Takahashi, Yoshiaki ; Noda, Ichiro ; Yao, Ming Long. / Extensional viscosity of polystyrene solutions in dilute region. In: Nihon Reoroji Gakkaishi. 1997 ; Vol. 25, No. 2. pp. 99-105.
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