A series of pyridinium‐based polymerized ionic liquid crystals (PILCs) with different anions were synthesized, including poly(pyridinium bromide)s and poly(pyridinium trifluoroacetate)s, and their chemical structure, liquid‐crystalline properties and conductivity properties were investigated by many experimental techniques. At low temperature, some PILCs containing less cholesteryl mesogens presented smectic A phases; while the PILCs containing more cholesteryl mesogens displayed bicontinuous cubic phases. At high temperature, all the PILCs showed nematic phases. Compared with the corresponding poly(pyridinium bromide)s based on identical polymer cations, the poly(pyridinium trifluoroacetate)s showed lower glass transition and isotropic transition temperature. The PILCs displayed excellent temperature‐dependent ionic conductivity, making it attractive for applications in temperature‐controlled electronic switches. In cubic and smectic A phases, the PILCs presented Arrhenius‐like ionic conductivity behavior, and they exhibited Vogel–Fulcher–Tammann‐like behavior in nematic phases.
Series of ionic liquid crystalline polymers (ILCPs) containing bipyridinium groups were synthesized by ionic self-assembly technology, and the chemical structure, selfassembly behavior, liquid crystalline property, and antistatic property were investigated by various techniques. All the polymers exhibit good thermotropic liquid crystal on heating cycle. The precursor bromo-polyesters displayed nematic phase, but the ILCPs (IPPy-Br, IPP-BF 4 and IPP-PF 6 series) containing bipyridine groups and different counter-anions showed smectic C phase. The effects of different counter-ions on liquid crystalline behavior were discussed in this study. The antistatic properties of these ILCPs were investigated by a four-probe measuring instrument. The surface resistivity was slight sensitivity to the surface water absorption due to the special structure of conductive channels of these ILCPs. It was found that all these ILCPs exhibited superior antistatic performance and ionic conductivity properties. In these ILCPs containing Br À , BF 4 À and PF 6 À counter-ions, the IPPy-BF 4 series of polymers with BF 4 À showed the maximum conductivity due to the influence of the BF 4 À anion in the ordered structure.
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