Poly(phthalocyaninatosiloxane)

[Si(Pc)O]n

with the number average degree of polymerization of about 130 was prepared by heating its monomer Si(Pc) (OH)2

in solid state at 420℃ for 42 hrs at 10-3 torr dynamic vacuum. The [Si(Pc)O]n powder was iodine doped with I2-bensene solution for 48 hrs. Pure iodine doped poly(phthalocyaninatosiloxune)

{[Si(Pc)O]Iy}n

fibers and {[Si(Pc)O]Iy}n/poly(p-pbenylene terephthalamide) blend fibers were wet-spun with dry nitrogen-sealed Teflon lined device. D.C. electrical conductivity of the fibers was measured by the four-probe method with an automated charge transport measurement system from 80K to room temperature.It was found that the dependence of conductivity

σ on temperature

T

could fit a group of thermal fluctuation-induced tunnelling(TFIT) equations

and that the dependence of conductivity on volume fraction

φ

of the iodine doped{[Si(Pc)O]Iy}n could fit a group of modified percolation equations.A three-dimensional composite composite polt of σ-1/T-φ shows that these two groups of equations match each other quite well.It has been pointed out that for the blend fibers their composition is the most important factor for both mechanical and electrical properties.