Synthesis of telechelic liquid crystalline ionomers containing sulfonate groups

Thermotropic main-chain liquid crystalline ionomers containing sulfornate groups was synthesized with liquid crystalline polymer and hydroxyl-azobenzensulfonic acid. The chemical structure, thermal properties and liquid crystalline character of liquid crystalline ionomers were analyzed with FT-IR, POM, DSC and WAXD, the result shows the ionomers have the same structures-nematic texture-with the previous polymers before ion monomer was added. This indicates the addition of ion monomer actually has no impact on the type of liquid crystal; however, to the same length of polymer chains, their liquid crystal properties gradually disappear as the increasing of addition of ion monomers, Tc and Tm of each liquid crystalline ionomers are increased with adding ionomers, but Tg is reduced.