CHARACTERIZATION OF SEGMENTED AND HIGHLY ORIENTED POLYACETYLENE BY ELECTRON-SPIN-RESONANCE

To obtain information about the correlation between the mean chain length and the ESR linewidth in 'standard' and 'new' polyacetylene defined concentrations of conjugation-breaking defects were incorporated using chemical methods, and the materials studied using ESR. The results are explained by a cluster-like insertion of the defects in 'new' polyacetylene. In highly oriented material the ESR linewidth shows a dependence on the angle between the direction of orientation in the polyacetylene sample and the magnetic field. This effect is explained by anisotropic hyperfine structure interaction.