Araya polyacetylene

Montaner et al. [74] have used electron diftraction to characterize Araya polyacetylene [21], prepared at 10°C from a Shirakawa catalyst system dissolved in a nematic liquid crystal, oriented by a magnetic field. The mosaic (orientation distribution) is broad, approximately 20° with respect to the fibre axis. A later x-... 

Polyacetylene containing a phenylcyclohexyl meso-gcnic side chain on every repeat unit has been synthesized by Yoshino et al. [158], employing the Araya method for a substituted 1-pentyne. The polymer shows the smectic A phase, and retains the layer structure upon cooling to the solid state. Only a low-angle diffraction corresponding to a spacing of 20-22 A is reported. 

K. Akagi, S. Katayama, H. Shirakawa, K. Araya, A. Mukoh, T. Narahara, Highly conductive polyacetylene film prepared by the liquid crystal polymerization method under magnetic field, Synth. Met., 17, 241-246 (1987). 

S.-Y. Oh, K. Akagi, H. Shirakawa, K. Araya, Synthesis and properties of hquid-crystalhne polyacetylenes with a phenylcyclohexyl mesogenic moiety in the side group. Macromolecules, 26, 6203-6206 (1993). 

Sogang University, Korea), Dr. K. Araya (Hitachi Ltd.), and Dr. H. Goto (University of Tsukuba) for their collaboration with the liquid crystalline polyacetylene derivatives (Section III). This work was supported by grants-in-aid for scientific research from the Ministry of Education, Culture and Science of Japan and from the Mitsubishi Foundation. 

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