Stress Relaxation in Linear Polymer Solutions after Stepwise Decrease of Shear Rate

Yoshiaki Takahashi, Yoshinobu Isono, Ichiro Noda, Mitsuru Nagasawa

研究成果: Contribution to journalArticle査読

9 被引用数 (Scopus)

抄録

Shear stress relaxation in linear polystyrene solutions after a stepwise decrease of shear rate from a value of γ1 to a lower value γ2was observed with an R-17 Weissenberg rheogoniometer. The experimental results in the region of low shear rates agreed well with the theory of linear viscoelasticity. In nonlinear regions, it was found that the initial parts of the relative relaxation curves compose a single line independent of γ2 if γ1is kept constant. The behavior is consistent with that of stress development after a stepwise increase of shear rate, reported previously. It was concluded that the quasi-network structure of polymer solutions has a stability and the structure change occurs with a time lag.

本文言語英語
ページ(範囲)153-156
ページ数4
ジャーナルMacromolecules
20
1
DOI
出版ステータス出版済み - 1 1 1987
外部発表はい

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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