Chain degradation in rheological measurements and effects of molecular weight distributions on rheological data for polymer solutions undergoing flow-induced phase separation

Yoshiaki Takahashi, Nobuo Ochiai, Masaki Yanagida, Shinichi Kitade, Ichiro Noda

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

We examined chain degradation in Theological measurements and the effects of molecular weight distributions (MWDs) on rheological data at steady states for polystyrenes in dioctyl phthalate undergoing flow-induced phase separation. The chain degradation occurred when we observed a strong overshoot in transient stresses. The suppression of overshoot by lowering the concentration and the molecular weights of the samples, and/or by making a step increase in the shear rate, was effective in preventing the degradation. The most significant difference between the rheological data for samples with broad and narrow MWDs is the existence of plateau in the first normal stress difference in the former. Shear rate dependences of the stresses of broad MWD samples in the shear rate range before the plateau are somewhat steeper than those of narrow MWD samples.

本文言語英語
ページ(範囲)4313-4317
ページ数5
ジャーナルpolymer
39
18
DOI
出版ステータス出版済み - 8 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

フィンガープリント 「Chain degradation in rheological measurements and effects of molecular weight distributions on rheological data for polymer solutions undergoing flow-induced phase separation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル