A series of styrene-phenyl vinyl sulfoxide diblock copolymers was prepared using the 'living' anionic polymerization technique. The thermally labile phenyl vinyl sulfoxides undergo an elimination process to yield acetylene moieties at 150°C. The weight and volume of the iodine-doped conducting fractions were adjusted by changing the length of the styrene block. A sigmoidal composition-dependent conductivity and a maximum in the dielectric constant measurement near the threshold composition suggested a 'percolation-like' conducting process. In addition to electrical measurement, the block copolymers were also characterized by infra-red spectroscopy, thermal analysis, ~H n.m.r., and size exclusion chromatography
Посилання на статтю:
Electrical properties of anionically synthesized conducting block copolymer from the precursor polystyrene-block-poly(phenyl vinyl sulfoxide) / Louis M. Leung* and Kam Ho Tan // Polymer. – 1994. – Vol 35. – P. 1556-1560.