Abstract: Acetylene polymerized by a heat aged mixture of Ti(OBu)₄^-AlEt₃ in various solvents(alkane and aromatic hydrocarbon)yields a high performance polyacetylene film (HPPA).Being doped with iodine, the films showed an electrical conductivity of 10³ S/cm at roomtemperature. The value was over 10⁴ S/cm after stretching of the film. The HPPA filmswere high compact and stable in air and composed of relatively ordered piling up of fibrils.Its apparent density and permeability of N₂ were 0.80g/cm³ and 3.2?10^-11 Jcm³ (STP)/cm²·s·cm Hg,respectively. The results of IR, TEM and X-ray diffraction indicated that the filmswere high crystalline and had 65-85% of cis-PA and 20-100 nm of fibre diameter.

Key words: Polyacetylene, Polymerization, solvents, High polymeric conductor, Physical property