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Characterization of Metallo‐Supramolecular Block Copolymers by Analytical Ultracentrifugation
Author(s) -
Raşa Mircea,
Lohmeijer Bas G. G.,
Hofmeier Harald,
Thijs Hanneke M. L.,
Schubert D.,
Schubert Ulrich S.,
Tziatzios Christos
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600235
Subject(s) - molar mass , analytical ultracentrifugation , supramolecular chemistry , sedimentation coefficient , copolymer , polymer , ultracentrifuge , sedimentation , polymer chemistry , chemistry , characterization (materials science) , molar mass distribution , peg ratio , materials science , molecule , nanotechnology , chromatography , organic chemistry , geology , paleontology , finance , sediment , economics , enzyme
Summary: Applications of analytical ultracentrifugation in the field of synthetic polymers have followed a clearly increasing trend in the past few years, concerning the variety of investigated samples, experimental approaches, and methods of data analysis. We report a characterization study of two metallo‐supramolecular diblock copolymers with different block lengths and of a chain extended metallo‐supramolecular polymer. The analysis of sedimentation velocity and sedimentation equilibrium profiles was discussed in detail and the results were compared to each other, to determine the molar mass distribution and the state of association in solution. A simple method for determining the average translational diffusion coefficients is proposed and discussed relative to other methods. The average values of the molar mass and sedimentation coefficient distributions, the average friction coefficients, and size information were obtained and discussed.c ( S ) analysis of SV profiles using Sedfit for the (PEG 180 ‐[Ru 2+ ]‐) n chain extended polymer showing the presence of several species.