CLUSTERING OF IONS IN ORGANIC POLYMERS: A THEORETICAL APPROACH.
MCGILL UNIV MONTREAL (QUEBEC) DEPT OF CHEMISTRY
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Clustering of ions in organic polymers is treated from a theoretical point of view. It is shown that ions in organic media of low dielectric constant exist most probably as pairs or higher multiplets, even at relatively high temperatures. The maximum size of a non-crystalline and approximately spherical multiplet is shown to be determined by the surface areas and volumes of the participating chemical species and is of the order of 8 ion pairs or less. At relatively low temperatures, the ionic multiplets can aggregate to form a cluster, the factors involved in cluster formation being the elasticity of the chains and the electrical work of cluster collapse. Several simple geometries are assumed for ethylene-sodium methacrylate clusters, and the average inter-cluster distance for 4.5 mol of the ionic component ranges from 44A to 95A. The experimentally determined repeat distance is of the order of 83A. Author
- Atomic and Molecular Physics and Spectroscopy