| Abstract
| - The crystal structure of the compound 5-p-(trans-4-pentacyclohexyl) phenoxy-1-pentyne(PCH503A) was determined by X-ray diffraction. The structure and orientational behavior of the polymer(PPCH503A), prepared from the monomer compound, was examined. As a result, it was found that thepolymers form an alternating comblike conformation of side chains and are stacked into a smectichexagonal structure. When shear stress was applied to the polymers, polymeric chains were orientedwith their axes of mesogenic groups parallel to the shearing direction; that is, the polymer backboneswere aligned perpendicular to the shearing direction. The oriented polymer exhibited a high anisotropyof electroconductivity, i.e., σ∥ (the electroconductivity parallel to the backbone) became 1.7 × 10-5 S/cmupon doping iodine, and the ratio of σ∥ to σ⊥ (the electroconductivity perpendicular to the backbone) wasabout 10.
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