|400. Penott-Chang, E.K.; Ruppel, M.; Pergushov, D.V.; Zezin, A.B.; Müller, A.H.E.: Interpolyelectrolyte complexes of diblock copolymers via interaction of complementary polyelectrolyte-surfactant complexes in chloroform, Polymer 52, 4296 (2011) -- DOI: 10.1016/j.polymer.2011.07.017|
|Key words: interpolyelectrolyte complexes, macromolecular co-assembly, polymer-surfactant complexes, interpolyelectrolyte complexation in organic solvent|
We have studied the interpolyelectrolyte complexation in chloroform between polystyrene-block-poly(cetyltrimethylammonium acrylate), (PA- CTA+), and poly(2-(methacryloyloxy)ethyldimethylethylammonium dodecyl sulfate) (quaternized poly(2-dimethylaminoethyl methacrylate) complexed with sodium dodecylsulfate), (PDMAEMAQ+ DS-). Turbidimetry, dynamic/static light scattering, and transmission electron microscopy show the formation of large aggregated interpolyelectrolyte complex species, which are colloidally stable in chloroform or even chloroform-soluble if the certain conditions are met. We suggest such co-assemblies to be micellar species with a core assembled from electrostatically coupled fragments of the polymeric components. The corona is built up either from a mixture of polystyrene blocks and excessive fragments of (PDMAEMAQ+ DS-) chains or from a mixture of polystyrene blocks and excessive fragments of (PA- CTA+) blocks, depending on which polymeric component was taken in excess for the interpolyelectrolyte complexation. However, their real structures may deviate from such idealized consideration because of the non-equilibrium character of interpolyelectrolyte complexation in organic media of low polarity.