Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.26: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Synthesis and characterization of polyelectrolyte complexes — •Christian Kessler — Physikalische Chemie der Polymere, TU Dresden, Germany

Polyelectrolyte complexes formed by Poly(dimethyldiallylammonium chloride) (PolyDADMAC) and poly(maleic acid) with three different copolymers were studied and characterized via light scattering, AFM and viscosity measurements. By varying the ratio of polyanion and polycation as well as the copolymers it was possible to tune properties like surface charge, hydrophilicity, radius, molar mass and overlap concentration. By using different chain lengths of PolyDADMAC two distinct complex structures could be obtained. Oppositely charged polyelectrolytes of roughly the same size resulted in spherical structures, while a size ratio of 1:10 produced needle-like complexes. Removal of the needles revealed additional compact spheres which could be shown by light scattering and AFM measurements. The addition of NaCl resulted in a reduction of the molar mass, radius and the second virial coefficient. Above a salt concentration of 0.03 mol/L these properties increased rapidly.