Electrohydrodynamic Instabilities in a Nematic Aromatic Polyester in Solution and in the Melt

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Abstract
Electrohydrodynamic instabilities have been studied in an aromatic polyester. Several modes are observed as a function of several parameters such as the frequency of the applied field and the type of surface anchorage. Although similarities to the behaviour of small molecule liquid crystals were found, there are new effects associated with the high viscosity of polymeric samples. The influences of the molecular weight and of the concentration in the polymer liquid crystal/conventional liquid crystal solution are discussed.