The effect of aging on the thermal behavior of sulfonated polystyrene
- 1 January 1982
- journal article
- research article
- Published by Wiley in Journal of Polymer Science: Polymer Physics Edition
- Vol. 20 (1) , 65-72
- https://doi.org/10.1002/pol.1982.180200105
Abstract
The thermal properties of an ionomer glass, lightly sulfonated polystyrene, was studied as a function of aging at room temperature after being cooled from the melt. An anomalous endothermic event below Tg was observed by differential scanning calorimetry; the intensity of this excess enthalpy was a function of time and sulfonate concentration. It is suggested that the origin of this relaxation may be due in part to morphological changes that occur as a consequence of electrostatic interactions of the sulfonate groups.Keywords
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