2009/06/22 by Sabine Rosenfeldt, S. Rosenfeldt, M. Ballauff +5 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Polymer Synthesis and Characterization #Dendrimers and Hyperbranched Polymers #Polymer Surface Interaction Studies #cond-mat.soft
paper · pdf · doi:10.1063/1.3155208
published as The Journal of Chemical Physics 130, 244901 (2009) · 8 pages, 4 figures
openalex publication_date 2009/06/22 · arxiv created 2009/07/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the influence of mutual interaction on the conformation of flexible poly(propyleneamine) dendrimers of fourth generation in concentrated solution. Mixtures of dendrimers with protonated and deuterated end groups are investigated by small-angle neutron scattering up to volume fractions of 0.23. This value is in the range of the overlap concentration of the dendrimers. The contrast between the solute and the solvent was varied by using mixtures of protonated and deuterated solvents. This allows us to investigate the partial structure factors of the deuterated dendrimers in detail. An analysis of the measured scattering intensities reveals that the shape of the flexible dendrimers is practically independent of the concentration in contrast to the pronounced conformational changes in flexible linear polymers.