抄録
Main chain liquid crystal polyamides (PAD) were synthesized by interfacial polycondensation of 4,4′-biphenyldicarbonyl chloride and N,N′-dimethyl-1,6-diaminohexane. Novel inorganic-organic nanohybrids consisting of PAD and titanium tetraisopropoxide were obtained by supramolecular complexation. Their orientational structures and physicochemical properties were examined. The nanohybrids with 0~20 wt% Ti contents and PAD clearly showed liquid crystalline phases, which were characterized by anisotropic optical textures obtained by microscopic observations under crossed nicols. The glass transition, mesophase-isotropic phase transition and thermal decomposition temperatures of the nanohybrids were higher when compared to PAD. Annealed samples of PAD and the nanohybrids exhibited inner reflections corresponding to the formation of a layer structure in the X-ray diffraction measurements. Layer spacings and molecular-lateral distances in the mesomorphic phase depended on the Ti content.
