III International Conference

PP-II-31composite particles. The presence of SWNT in acatalytic mixture does not affect high yield ofpolymer (96 %). However, the polymerization timeis becomes two times longer. Possibly, a catalystforms a less catalytically active complex withnanotubes and the rate of growth of polyacetylenechains is comparable with the rate of theircrystallization to the solid phase. According to the data of IR, PA bound to SWNT is adefectless, highly ordered, long-chain polymer comprising extended enough both trans- andcis-rings (60 % of trans- and 40 % of cis-isomers).The dc conductivity of the pressed samples are 5.10 –10 (polyacetylene),8.2 ⋅ 10 –9 1.8 ⋅ 10 –7 (Ω cm) –1 (composite). A rather insignificant growth of conductivity withan increase in the content of the SWNTs in the composites compared to the mechanicalmixing of components is apparently associated with the insulating effect of a thickpolyacetylene shell that hampers direct contacts between nanotubes. Electrochemical behaviorof the electrodes pressed from a PA-SWNT composite was studied using cyclic voltammetry(CVA) in 1 М LiPF 6 dissolved in ethylene carbonate – diethyl carbonate – dimethyl carbonate(1:1:1) mixture. At 1 mV/s scan rate, the currents of Li + intercalation for the composite are50 times higher as compared to starting PA. An increase in conductivity is more distinct inelectrochemical measurements when the doping of polyacetylene by lithium cations occursand polyacetylene transforms into the conducting state.This work was supported by the Russian Foundation for Basic Research (Grant No.03-03-32692).References1. Chmutin I.A, Ponomarenko A.T, Krinichnaya E.P., Kozub G.I, Efimov O.N. // Carbon. 2003.V41N7. P1391.2. N. M. Galashina, L. N. Grigorov, E. I. Shklyarova, andN. S. Enikolopyan, Dokl. Akad. NaukSSSR 270, 351(1983).220