CONDUCTIVE PROPERTIES OF POLY(4-VINYLPYRIDINE) POLY(DIMETHYLSILOXANE)BLOCK-COPOLYMERS DOPED WITH TETRACYANOQUINODIMETHANE

Poly(4-vinylpyridine)-poly(dimethylsiloxane) (P4VP-PDMS) block copolym ers with various compositions were prepared by anionic polymerization. The 4VP block was quaternized with methyl iodide and reacted with 7,7 ',8,8'-tetracyanoquinodimethane (TCNQ), which is in both anion radical (TCNQ-.) and neutral form (TCNQ0). The products were then characteriz ed by H-1 nuclear magnetic resonance and Fourier-transform infra-red s pectroscopy, scanning electron microscopy and differential scanning ca lorimetry techniques. The electrical conductivities of processable and flexible films of these block copolymers were measured with the four- probe method and found to be as high as 10(-2) S cm-1. The optimal TCN Q0 doping for which the conductivities are highest were also determine d.