Examination of condition for fine structure of immiscible polymer blends step change of shear rate

Yoshiaki Takahashi, Masanao Suzuki, Ichiro Noda

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Effective flow conditions for making fine structure of a model immiscible polymer blend, i.e., equiviscous immiscible polymer blend was examined by using interrupted flow and combination of step increase and decrease of shear rate. Overshoot peak of first normal stress difference, which corresponds to the existence of most elongated domains, was used as an indicator for changing shear rate. That is, shear rate was decreased (including zero shear rate) just after the overshoot peak of first normal stress difference appeared. Time needed to rupture the elongated domains and also droplet size and distributions thus obtained were compared to the data evaluated by using shear flow with step increase of shear rate. The time needed to rupture the domain with interrupted flow and combination of step increase and decrease of shear rate was shorten to be one fifth and the size of domains and their distribution were almost the same compared to corresponding data for flow with step increase of shear rate. It was concluded that decreasing of shear rate at the most elongated state of domain structure is an effective procedure to make fine structure of immiscible polymer blends.

本文言語英語
ページ(範囲)1286-1290
ページ数5
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
49
12
DOI
出版ステータス出版済み - 12 2000
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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