| 초록 |
Side chain liquid crystalline polymers have been used for the preparation of ordered and optically anisotropic network films. We prepared smectic layered polymer networks using side chain liquid crystalline polymer having thermally crosslinkable urethane bond. Thermal annealing of the polymer in its smectic phase caused the urethane bonds to be cleaved, generating isocyanato groups. The subsequent reaction of the isocyanato groups in the same layer resulted in the creation of polymer network sheet. This network is insoluble in any organic solvents and smectic layered structure is maintained independent of temperatures. X-ray analysis showed three reflection peaks corresponding to d spacings of 49, 25, and 17 Å, and TEM image showed that the thickness of lamellar spacing was about 5 nm. |
