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Electromechanical effects in ferroelectric liquid crystalline polymers
Author(s) -
Jákli Antal,
Éber Nándor,
Bata Lajos
Publication year - 1992
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1992.220030512
Subject(s) - materials science , ferroelectricity , liquid crystal , polymer , ferroelectric polymers , planar , composite material , side chain , vibration , layer (electronics) , coupling (piping) , dielectric , optoelectronics , acoustics , computer graphics (images) , physics , computer science
Electric fields can induce mechanical vibrations in planar aligned sandwich cells of ferroelectric liquid crystals. Measurements on a polysiloxane and a polyacrylate side chain polymer proved that the electromechanical effect also exists in ferroelectric liquid crystalline polymers. The main characteristics of the electromechanical responses of these polymers are described and compared to the response of low molecular weight ferroelectric liquid crystals. According to the proposed interpretation, the vibrations in the direction parallel to both the smectic layers and cell substrates are due to coupling between the director rotation and the flow, while the resonances in the vibrations normal to the plates are connected to layer deformations.