Abstract
We comment on both flow behavior (shear stress vs. shear rate) and universal yield stress equation of electrorheological (ER) suspensions of recently reported conducting polypyrrole (PPy)-coated polyethylene (PE) under applied electric strengths. Our proposed Cho-Choi-Jhon (CCJ) shear stress model not only fits flow curves for the PPy-coated PE ER fluid, but also provides a better explanation on their flow properties compared to De Kee–Turcotte model. Moreover, using the deduced critical electric field strength and additional scaled parameter, we find that the universal yield stress equation proposed collapses the data of double-coated PE onto a single curve.
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