| Abstract
| - Novel liquid crystalline polyacetylene derivatives were developed as advanced LC conjugatedpolymers with quick response to an electric field used as external force. In practice, we synthesizedferroelectric LC conjugated polymers by introducing fluorine-containing chiral LC groups into side chainsof polyacetylenes. Phase-transition behaviors of these polymers were examined by differential scanningcalorimetry and polarizing optical microscopy. Mesophases as well as higher order structures wereevaluated with X-ray diffraction measurements. The polymers synthesized showed chiral nematic (N*),twist grain boundary smectic A (TGBA*), and chiral smectic (SmC*) phases in the heating and coolingprocesses. Observation of the SmC* phase allows us to expect that the polymer should exhibitferroelectricity.
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