Thermal and ferroelectric properties of two series of coloured chiral liquid crystalline side group copolymers

✍ Scribed by Frank Thomas Niesel; Joachim Rübner; Jürgen Springer

• Book ID: 102482721
• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 397 KB
• Volume: 196
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1995.021961218

✦ Synopsis

Abstract

Two series of liquid crystalline side group copolymethacrylates were synthesized and their thermal and ferroelectric properties determined. All copolymers contain the same azobenzene mesogen spaced from the backbone by a heptamethylene sequence but different chiral co‐compounds were used. The samples show either a monolayer or a bilayer smectic C* phase but only four polymers with a low content of the azo‐dye could be switched ferroelectrically. The formation of the smectic C* phase of some samples was found to be hindered. In order to study this phenomenon as a function of the molecular weight one copolymer was fractionated.