Novel Modified Polymers with Permanent Cationic Groups

Abstract

Several new polyelectrolytes with regular structure are introduced: block copolymers containing poly(ethylene glycol) and cationic polysoap blocks, amphiphilic block copolymers containing cationic and strong hydrophobic blocks, and polycarboxybetaines with narrow molecular weight distribution. Determination of the molecular weight of the polycarboxybetaines could be performed by SEC. As revealed by viscometry and potentiometric titration, the solution properties of the polyzwitterions depend to a high extent on the steric hindrance of the N + moiety. Viscometry as well as measurement of the micelle polarity and of the solubilization capacity proved both intra- and intermolecular aggregation to take place with the polysoap block copolymers. Investigations of the micellization of the block copolymers containing strong hydrophobic blocks were followed by application of these polymers as stabilizers in the emulsion polymerization.