Abstract
The glass-transition temperatures of a wide range of ionenes have been studied as a function of the spacing of ions and the dielectric constant of the plasticizer. For solvents of a high dielectric constant the extrapolated glass transition of most ionenes has a value of ca. 0°C, while for plasticizers of a low dielectric constant the value centers around −80°C. It is suggested that a conformational transition is responsible for this drastic change in the extrapolated Tg values. A q/a effect was also found, the slope of the Tg vs. q/a plot being 695, i.e., quite similar to that for the phosphates, silicates, and acrylates.
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Eisenberg, A., Matsuura, H. & Yokoyama, T. The Glass Transition of Aliphatic Ionenes. Polym J 2, 117–123 (1971). https://doi.org/10.1295/polymj.2.117
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DOI: https://doi.org/10.1295/polymj.2.117