Dielectric Behavior in Chiral Smectic Phases of Main-Chain Polyesters

Hiraoka K; Sugano Y; Monzen K; Uematsu Y; Tokita M; Watanabe J; Furukawa T

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.299, 229-234, 1997

DOI10.1080/10587259708041999 Export Citation

Dielectric Behavior in Chiral Smectic Phases of Main-Chain Polyesters

Hiraoka K, Sugano Y, Monzen K, Uematsu Y, Tokita M, Watanabe J, Furukawa T

We have investigated the SmA-SmC* phase transition of main-chain polyesters having a mesogenic p,p’-bibenzoate unit by means of the dielectric and electrooptic measurements. In the SmC* phase, a relaxation due to the Goldstone mode was observed at several 10 Hz. In addition, we recognized the other relaxation exhibiting softening behavior around the SmA-SmC* phase transition temperature.

Keywords:THERMOTROPIC LIQUID-CRYSTALS;MESOGENIC 4;4’-BIPHENYLDICARBOXYLATE UNIT;SOFT MODE;POLYMERS;POLARIZATION