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Solution behavior of Na sulfonated polystyrene: Dipole moment determinations
Date
1990
Author
Güler, Hatice
Aras, Leyla
Vanderschueren, J.
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Solution behavior of Na sulfonated polystyrene (NaSPS) ionomers with different percentages of sulfonate was studied by viscosity and dipole moment measurements. Two solvents of different character were chosen, i.e. dioxane (ϵ = 2.22) and dimethyl formamide (DMF, ϵ = 36) and their mixtures. The reduced viscosity as a function of concentration in polar solvents reflects the ‘polyelectrolyte’ behaviour of the ionomers. Mean‐squared dipole moment (<μ2>/x) values were calculated over a temperature range of 20–100°C, in dioxane and in a mixture of 4% DMF in dioxane. The results confirm the ‘polyelectrolyte’ behavior of ionomers by the addition of a small amount of polar cosolvent. The effect of increasing temperature on <μ2>/x in the DMF‐dioxane mixture is attributed to the formation of a coordination complex.
Subject Keywords
General Engineering
,
General Materials Science
,
Polymer Science
URI
https://hdl.handle.net/11511/51395
Journal
British Polymer Journal
DOI
https://doi.org/10.1002/pi.4980220310
Collections
Department of Chemistry, Article