| 摘要 |
PROBLEM TO BE SOLVED: To form a heat-resistant alignment film which can be produced easily and efficiently even when it has a large area while adopting a coating method by converting a crosslinkable liq.-crystalline polymer having azide groups in the molecule into a soln. SOLUTION: This polymer has azide groups, pref. at the ends of mesogens, in the molecule, is thermotropic, and exhibits an alignment such as a nematic or cholesteric alignment through alignment planes in the liq. crystal temp. range, forming a monodomain. An alignment layer is formed by preparing a soln. of the liq.-crystalline polymer, applying the soln. thinly on an alignment formation plane, drying the soln. to remove a solvent, and heating the resultant layer to a temp. higher than the glass transition point of the polymer but not higher than a temp. at which the polymer melts and exhibits an isotropic phase. The alignment layer is crosslinked by irradiating with light and/or by heating to give a heat-resistant alignment film. |
