Abstract:
A side-chain liquid crystalline polysiloxane with two bluephase mesogenic monomers:trans-4-vinyltrans-4′-ropylbicyclohexyl and trans4-propenyltrans4′-propylbicyclohexyl exhibiting mosaic and oil grain textures was synthesized. The chemical structures of the obtained polymers were confirmed by FTIR and 1HNMR spectroscopy.Their mesomorphic properties and phase behavior were investigated with POM, DSC, TGA and X-ray measurements. The temperature ranges of mesogenic phase of 3HHV and 4HHV are 30.6 °C and 49.7 °C, respectively, and they exhibit mesomorphic phase below room temperature. The polymer exhibits grain shadow texture phase, decomposition temperature (at 5% mass loss) is more than 310 °C, and the temperature ranges of mesogenic phase is 192.6 °C. They also exhibit mesomorphic phase below room temperature. The thermal stability is much higher than other sidechain liquid crystalline polysiloxane with nonaromatic mesogenic monomer.