Filler and Percolation Behavior of Ionic Aggregates in Styrene-Sodium Methacrylate Ionomers

Abstract

The dynamic mechanical properties of poly(styrene-co-sodium methacrylate) ionomers were reexamined in detail and the data interpreted in terms of filler and percolation concepts using the Eisenberg-Hird-Moore (EHM) multiplet/cluster model of random ionomers. Deconvolutions were performed on the loss tangent data. The glassy moduli of the ionomers were found to be independent of the ion content. There were discontinuities in the plots of the slopes of the storage moduli, peak heights, peak positions, and widths at the half-height of the loss tangent peaks as well as of the activation energies for the glass transitions as a function of ion content