Ion-Conducting Polymers - Quenched to Dynamic Disorder

Details Ion-Conducting Polymers - Quenched to Dynamic Disorder Ion-Conducting Polymers - Quenched to Dynamic Disorder

1999-10-05

arxiv.org/abs/cond-mat/9910055v1

Physics

Condensed Matter

8 pages LaTeX, 4 postscript figures, Communicated to Solid State Communications

Scientific paper

10.1016/S0038-1098(99)00555-4

Ion conducting polymers have a biphasic character with crystalline as well as amorphous phases. There is moreover, a dynamic disorder due to motion of polymer chain segments. The PEO-NH$_4$ClO$_4$ system undergoes a crossover from a DLA-type morphology for low salt fraction (X) to a structure with polygonal spherulites. In the present communication we show that the low X regime exhibits a variation of diffusivity with crystallinity typical of a quenched system, whereas the high X regime has dynamic disorder with rapid rearrangement.

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