NEW SIDE-CHAIN LC POLYSILOXANES WITH CARBONYL-BOUND CHIRAL TERMINAL GROUP

A synthetic route has been developed to a new series of homo- and co-p olysiloxanes with a terminal chiral 2-(S)-butyl fragment attached to t he mesogenic biphenyl core via the ketone binding group, >C=O. The syn thesis, structure and ferroelectric properties of the polymers are rep orted. All the polymers show in their S-A phases an unusual decrease i n the interlayer distance with increasing temperature.