Novel electrorheological materials with ternary blends containing polyethers and urethanes

Keiji Minagawa, Tetsuo Kanno, Hirokazu Okamura, Takeshi Mori, Seizo Masuda, Hidenao Takagi, Kiyohito Koyama, Masaki Tanaka

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Ternary ER blends composed of two different liquids and solid dispersoid were prepared by blending silicone oil, viscous polyether liquid, and urethane powder at various compositions. The polyether liquid used here was polytetramethylene glycol modified with phenyl isocyanate, and the powdér was urethane derivative of 4,4′-diphenylmethane diisocyanate. Under certain conditions, some of the ternary blends showed larger increase of viscosity under an electric field than those of binary mixtures prepared from each component of the ternary one. In this case, the viscous polyether and urethane powder act cooperatively by forming some particular structures within the blends. Microscopic observation revealed that each urethane particle was covered with polyether liquid in the absence of electric field, and that the binary droplets aggregated to form viscous bridges between the electrodes keeping powders within them.

Original languageEnglish
Pages (from-to)2481-2486
Number of pages6
JournalInternational Journal of Modern Physics B
Issue number17-18
Publication statusPublished - Jul 20 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics


Dive into the research topics of 'Novel electrorheological materials with ternary blends containing polyethers and urethanes'. Together they form a unique fingerprint.

Cite this