DISTRIBUTION OF NEUTRAL SOLITONS IN T-POLYACETYLENE - CRYSTALLINE ANDAMORPHOUS REGIONS

Several parameters of magnetic resonances are studied to obtain the di stribution of the neutral solitons on mechanically stretch-oriented t- polyacetylene prepared by Narrmann-Theophilou type technique. Degree o f orientation characterized by the second moment of proton NMR is comp ared with the ESR linewidth, spin-lattice relaxation rate and NMR spin -lattice relaxation rate. The result suggests several times higher con centration of the neutral solitons in the amorphous region. T-1H(-1) o f proton NMR suggests a small but finite existence of relaxation path to fixed paramagnetic spins through spectral diffusion.