1119 マイクロフーリエレオメータを用いた液晶のスクイーズ流れにおける ER 特性の検討

概要

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We have investigated flow properties of liquid crystals under electric fields in an oscillatory squeezing flow. Micro Fourier Rheometer was utilized to estimate the dynamic visco-elasticity and electric rheological (ER) effects. Similar ER effect to that in steady flow, i.e. increase in dynamic viscosity due to the electric fields, is observed, but apparent viscosity estimated in a high frequency region under the electric fields is smaller than that measured with no electric field. Elastic property in the oscillatory squeezing flow becomes remarkable in middle region where both influences from electric fields and the shear flow are effective. These complicated ER effects may be construed with magnitude of moments acting on the liquid crystal generated with electric field and shear.
一般社団法人日本機械学会の論文
2002-09-20