COLL 364 |
| Thomas Komenda, Lehrstuhl für Makromolekulare Stoffe, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany and Rainer Jordan, Lehrstuhl für Makromolekulare Stoffe, TU München, Lichtenbergstr. 4, 85747 Garching, Germany. |
| Besides the many advantages of atom transfer radical polymerization (ATRP), one limitation is the contamination of the resulting polymers by metal traces from the catalysts. To overcome this problem, solid supported catalytic systems were developed. However, additional problems, such as mass transport, decreased activity of the catalyst arises. Here we present a hybrid system combining the advantage of an immobilized heterogeneous catalytic system and a homogeneous system, where the catalytic center is located in a polymer micelle. A series of amphiphilic block copolymers of 2-alkyl-2-oxazolines, bearing a terminal silane function for surface attachment and triphenylphosphine ligands for metal complexation were synthesized. The length of the hydrophilic block, functioning as a flexible spacer between the support and the aggregating hydrophobic segments, was varied in order to overcome mass transport limitations and to benefit from the enhancing effect in micellar catalytic systems. |
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Adsorption of Macromolecules at Liquid-Solid Interfaces
Division of Colloid and Surface Chemistry |