Distribution of Iodine in Doped Polyacetylene Filme

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Abstract
The distribution of iodine in polyacetylene doped under conditons typical for most published work is investigated by energy dispersive X-ray analysis under an electron microscope. The 9.1 GHz dielectric constant of a series of iodine doped (CH)x is measured as a function of temperature. From the X-ray analysis we conclude that the reaction takes place in two steps: a fast reaction at the fiber surfaces and a slow reaction with the interior of (CH)x fibers. The dielectric dconstant of lightly doped (CH)x in the interior of the fibers. The temperature dependence of ε is believed to be related to the intrinsic temperatue dependence of the conductivity of the highly doped fiber surface layers.