Electrohydrodynamic Effect on Phase Separation Morphology in Polymer Blend Films

Tsutomu Kikuchi, Masato Kudo, Chengjun Jing, Takao Tsukada, Mitsunori Hozawa

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We have investigated the effect of electrohydrodynamic (EHD) convection on the domain structure in a polystyrene (PS)/polyvinyl acetate (PVA) blend film to demonstrate the feasibility of using the EHD effect as a means of mixing and morphology control in a polymer blend film prepared by solvent evaporation. Here, polymers - toluene solutions were spread on a glass substrate with patterned electrodes to apply a dc electric field, and well-defined structures of EHD convection were formed in the polymer solutions. As a result, regular patterns were formed in the PS/PVA polymer blend film in which PVA-rich domains were confined within each unit of patterned electrodes, i.e., between positive and negative electrodes, at an appropriate electric voltage. In addition, it was demonstrated that such novel morphology is not due to the wetting/dewetting effect of polymer components to the Pt electrodes deposited on the glass substrate, by experiments with a SiO2-covered substrate.

Original languageEnglish
Pages (from-to)1234-1238
Number of pages5
Issue number4
Publication statusPublished - 2004 Feb 17


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