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Novel route to dendritic structures and their application for surface modification

2006; Wiley; Volume: 44; Issue: 4 Linguagem: Inglês

10.1002/pola.21251

1099-0518

Sandra Reemers, Ahmed Mourran, Helmut Keul, Martin Möller,

Advanced Polymer Synthesis and Characterization

Abstract Monodisperse branched polyurethanes containing long alkyl chains have been prepared by a new convergent synthesis. This synthesis comprises two steps, with hexamethylene diisocyanate uretdione as the starting molecule. The free isocyanate groups of this monomer are reacted with long‐chain alkanols. These diurethane uretdiones are then reacted with amines or amino alcohols under ring opening and the formation of a biuret group. Branching points are not, as usual, part of the monomer but are formed during preparation. The structure of these dendrons has been established with NMR spectroscopy, elemental analysis, mass spectroscopy, and gel permeation chromatography. The dendritic polyurethanes are thermally stable up to 200 °C. Surfaces coated with these materials are hydrophobic. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 1372–1386, 2006