The ability to build up polymersomes, from endgroup functionalized amphiphilic ABA polyoxazoline triblock copolymers is in focus of this research. In this work we describe the synthesis of polymethyloxazoline-block-polyphenyloxazoline-block-polymethyloxazoline triblock copolymers with defined endgroups. We were able to prepare these polymers by cationic ring opening polymerization initiated by the bifunctional initiator a,a' -dibromo-p-xylene. The ABA triblock copolymers were fully functionalized with the model reactant pyridine to proof the living character of the end groups. The obtained polymers were characterized by 1H NMR spectroscopy and size exclusion chromatography. The synthesized triblock copolymers were used to create polymersomes. We confirmed the spherical vesicles by scanning electron microscopy and could prove that these vesicles were hollow spheres by transmission electron microscopy. Additional dynamic light scattering measurements confirmed the size of the polymersomes, which were measured by TEM and SEM.

Amphiphilic telechelic ABA triblock copolymers based on oxazolines

243rd National Meeting (2012)

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