Abstract
In the study, we synthesized poly (arylene ethynylene) type polymers containing a mesogenic group in the side chain. Their mesogenic polymers improve their orientation and consequently, it would be obtained a higher order of physical value such as electric conductivity and nonlinear optical properties. The mesomorphic properties of the polymers were examined by DSC and polarized optical microscopy. Transition temperature varied remarkably with a kind of side chain. The polymers incorporated mesogenic group at the side chain into aryl groups exhibited enantiotropic nematic phase, and the optical texture was frozen at room temperature. All polymers were soluble in organic solvent such as chloroform, toluene, THF, DMF. Growing the π-conjugated length was supported by UV measurement.
