Aqueous solutions of star-like polyelectrolytes (PEs) exhibit distinctive features that originate from the topological complexity of branched macromolecules. In a salt-free solution of branched PEs, mobile counterions preferentially localize in the intramolecular volume of branched macroions. Counterion localization manifests itself in a dramatic reduction of the osmotic coefficient in solutions of branched polyions as compared with those of linear PEs. The intramolecular osmotic pressure, created by entrapped counterions, imposes stretched conformations of branches and this leads to dramatic intramolecular conformational transitions upon variations in environmental conditions. In this chapter, we overview the theory of conformations and stimuli-induced conformational transitions in star-like PEs in aqueous solutions and compare these to the data from experiments and Monte Carlo and molecular dynamics simulations.
|Title of host publication||Self organized nanostructures of amphiphilic block copolymers I|
|Place of Publication||Berlin|
|Publication status||Published - 2011|
|Name||Advances in polymer science|
- block-copolymer micelles
- consistent-field theory
- poly(methacrylic acid) brushes
- molecular-dynamics simulations
- modified poly(ethylene oxide)
- angle neutron-scattering
- polymer brushes
Borisov, O. V., Zhulina, E. B., Leermakers, F. A. M., Ballauff, M., & Muller, A. H. E. (2011). Conformations and solution properties of star-branched polyelectrolytes. In A. H. E. Müller (Ed.), Self organized nanostructures of amphiphilic block copolymers I (pp. 1-55). (Advances in polymer science; No. 241)..