Extensional Viscosity of Low Viscous Polymer Solutions Measured by Pressure Drops in Abrupt Contraction Channels

• Hidema Ruri

  Department of Chemical and Science Engineering, Kobe University

• Shiraki Takahito

  Department of Chemical and Science Engineering, Kobe University

• Tanino Yuki

  Department of Chemical and Science Engineering, Kobe University

• Komoda Yoshiyuki

  Department of Chemical and Science Engineering, Kobe University

• Suzuki Hiroshi

  Department of Chemical and Science Engineering, Kobe University

抄録

Extensional flow properties of dilute viscoelastic solution have attracted much attention for almost three decades. This is because extensional viscosity or relaxation time of viscoelastic solution under extensional stresses add a lot of impact on fluidity of the solution; the phenomenon is related to many industrial applications. Several techniques were proposed and many studies were conducted to measure extensional properties of polymer solutions. However, less studies were reported in the case of non-uniform solution, such as suspensions. In this study, we propose a relatively simple method to measure extensional viscosity. We adopt a syringe-shape abrupt contraction channels for the measurement; the syringe-shape apparatus is useful to contain non-uniform dilute solutions. As a first step to develop the experimental apparatus and method, we tested polymer solutions. Polymers used to prepare sample solutions were polyethylene oxide (PEO), hydroxypropyl cellulose (HPC) and polyacrylic acid (PAA). Each polymer has different flexibility, which cause different characteristics of the extensional viscosity of polymer solutions. Extensional viscosities obtained in this study detected the characteristic of each polymer solution. Extensional viscosities of PEO solution was increased by increasing extensional rates; that of HPC and PAA solution were decreased by increasing extensional rates; the tendency was explained by relaxation times of each polymer solution.

収録刊行物

• 日本レオロジー学会誌

  日本レオロジー学会誌 46 (1), 13-22, 2018

  一般社団法人 日本レオロジー学会

キーワード

• Extensional viscosity
• Abrupt contraction channel
• Pressure drop

詳細情報

• CRID: 1390282680070964224
• NII論文ID: 130006707956
• NII論文ID: 40021481951
• NII書誌ID: AN00198812
• DOI: 10.1678/rheology.46.13
• ISSN: 21864586
• ISSN: 03871533
• NDL書誌ID: 028854892
• Web Site: http://id.ndl.go.jp/bib/028854892
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028854892
• Web Site: https://www.jstage.jst.go.jp/article/rheology/46/1/46_13/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可