The structure of sulfonated polystyrene ionomers in chloroform was studied by molecular hydrodynamics and neutron scattering methods. The ionomer containing 1.35 mol % of ionogenic SO3Na groups undergoes the coil-globule transition and transforms to a micellar structure due to attraction of polar groups concentrated in the core surrounded by nonpolar chain fragments. At a sulfonation degree of 2.6 mol %, selfassembly of SO3Na groups with adjacent chain segments to the structure such as a spherical layer, i.e., vesicle (hollow micelle with solvent) with boundaries formed by nonpolar chain fragments, is observed. Vesicular structures in solution associate in pairs. Intra- and interchain associations are significantly enhanced by hydrogen bonds in ionomers with acid groups SO3H (2.6 and 4.47 mol %) which stabilize micellar structures, promoting their assembly into chain clusters and fragments of the simple cubic lattice.
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Original Russian Text © V.T. Lebedev, Gy. Török, A.B. Melnikov, D.N. Orlova, I.N. Ivanova, 2009, published in Poverkhnost’. Rentgenovskie, Sinkhrotronnye i Neitronnye Issledovaniya, No. 8, pp. 16–25.
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Lebedev, V.T., Török, G., Melnikov, A.B. et al. Molecular and supramolecular structure of sulfonated polystyrene ionomers in solutions. J. Synch. Investig. 3, 582–591 (2009). https://doi.org/10.1134/S102745100904017X
- Surface Investigation
- Neutron Technique
- Vesicular Structure
- Ionogenic Group
- Micellar Structure