Mechanical properties of dynamically disordered networks

Abraham Nitzan, Rony Granek, Mark A Ratner

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3 Citations (Scopus)

Abstract

Ionic motion in polymeric ionic conductors has been recently described in the framework of dynamic percolation theory (DPT) or, more generally, dynamic disorder hopping (DDH). In these models the polymer network above the glass transition is modelled as a random bond network in which the random bond distribution evolves in time with rate characteristic to the polymer motion. The present paper deals with the mechanical properties of such networks. We present a simple analysis of the viscosity of such dynamically disordered networks, thus relating a characteristic network relaxation time to the local (microscopic) viscosity of the polymer. If the same time is assumed to govern ionic transport, we obtain a relation between the ionic diffusion rate and the polymer viscosity. Estimates of the ionic diffusion based on this model are consistent with experimental observations.

Original languageEnglish
Pages (from-to)1018-1021
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume131-133
Issue numberPART 2
DOIs
Publication statusPublished - Jun 2 1991

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

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