title: Response of shear stress to ac electric fields under steady shear flow in a droplet-dispersed phase.
abstract: We have measured the response of shear stress to ac electric fields under steady shear flow in the droplet-dispersed phase of an immiscible polymer blend. A characteristic mode was found under steady shear flow, the relaxation frequency of which increased with increasing the shear rate. In the frequency dispersion, a scaling relation derived from dimensional analysis was confirmed to hold. The origin of the mode was investigated on the basis of the Maffettone-Minale (MM) model, in which the droplet shape is described by a second-rank tensor. The frequency dispersion of the response was also calculated using a modified MM model.
authors.affiliation: Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
authors.forename: Yang Ho
authors.initials: YH
authors.lastname: Na
authors.forename: Kohei
authors.initials: K
authors.lastname: Aida
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Sakai
authors.forename: Toyoji
authors.initials: T
authors.lastname: Kakuchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Orihara
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D008956:Models, Chemical; D044367:Phase Transition / Q000528:radiation effects; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D033081:Shear Strength / Q000528:radiation effects; D012996:Solutions / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D011108:Polymers; D012996:Solutions