Abstract
Positron annihilation spectroscopy has been applied to measure the free-volume hole distribution in poly(ether urethane) as a function of temperature. The hole radius distribution determined from orthopositronium lifetime distribution is found to shift to a larger values with increasing temperature. This result, combined with the variation of ionic conductivity, suggests that carrier ions do not migrate naked but are bound to polymer segments through ion-dipole interaction forces, and the ion migration is controlled primarily by segmental motion of the polymer.
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Peng, Z.L., Itoh, Y., Li, S.Q. et al. Study of the ionic transport in polymer electrolyte using positron lifetime distribution method. Appl. Phys. A 63, 267–270 (1996). https://doi.org/10.1007/BF01567879
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DOI: https://doi.org/10.1007/BF01567879