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Molecular and supramolecular structure of sulfonated polystyrene ionomers in solutions

Abstract

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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Correspondence to V. T. Lebedev.

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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

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Keywords

  • Surface Investigation
  • Neutron Technique
  • Vesicular Structure
  • Ionogenic Group
  • Micellar Structure