Ferroelectric liquid crystalline polymers main chain

Mesogenic groups can be incorporated into polymeric systems [7]. This results in materials of novel features like main chain systems of extraordinary impact strength, side-chain systems with mesogens which can be switched in their orientation by external electric fields or—if chiral groups are attached to the mesogenic units—ferroelectric liquid crystalline polymers and elastomers. The dynamics of such systems depends in detail on its molecular architecture, i.e. especially the main chain polymer and its stiffness, the spacer molecules... 

The surface-stabilized ferroelectric liquid crystals in the smectic C (SmC ) phase are among the most interesting types of liquid-crystalline systems because of their potential applications in high-resolution flat panel displays and fast electro-optical devices [73-76]. Within this class of compounds, ferroelectric liquid-crystalline polymers (FLCPs) have gained theoretical and practical interest as systems which combine the properties of polymers and ferroelectric liquid crystals. This combination is achieved by attaching the ferroelectric mesogen to a main chain via a flexible spacer... 

The author s group chose polyacrylate [102, 103], polyoxyethylene [104, 105], polysiloxane [103], and a polyacrylate/polysiloxane hybrid polymer [106] as the main chain according to the design in Fig. 1.26b-e. We attached various kinds of side-chain structures onto polymer main chains described above and checked the physical properties of these side-chain-type ferroelectric liquid crystalline polymers (FLCPs). 

Keller, P., Shao, R., Walba, D. M., and Brunei, M., The first high polarization ferroelectric main chain liquid crystalline polymers. Liq, Cryst., 18, 915-918 (1995). 

Vallerien SU, Zentel R, Kremer F, Kapitza H, Fischer EW (1989) Ferroelectric modes in combined side-group main chain liquid-crystalline polymers. Makromol Chem Rapid Commun 10(7) 333-338... 

S. U. VUIerien. R. ZenteL F. Kremer, H. Kapttza, and B. H. Fisdicr, Ferroelectric modes in combined side gro q> main chain liquid crystalline polymers. MakromoL Chem. Rapid Comimm. 10 335 (1969). 

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