Interpolyelectrolyte complexes of diblock copolymers via interaction of complementary polyelectrolyte-surfactant complexes in chloroformстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We have studied the interpolyelectrolyte complexation in chloroform between polystyrene-block-poly(cetyltrimethylammonium acrylate), (PS-b-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.