TY - JOUR A1 - Knappe, Patrick A1 - Bienert, Ralf A1 - Weidner, Steffen A1 - Thünemann, Andreas T1 - Poly(acrylic acid): A combined analysis with field-flow fractionation and SAXS T2 - Macromolecular chemistry and physics N2 - Polyelectrolytes such as PAA and its salts are widely used, but are notoriously difficult to characterize due to their polyelectrolyte properties and broad molecular mass distributions. In this paper, we report on a new PAA analysis by combining asymmetrical flow field-flow fractionation and an advanced SAXS technique using an acoustic levitator to minimize background scattering. The proof-of-principle is demonstrated with a mixture of three standard PAAs with different molecular masses. Detailed information on the PAA fractions is available on radii of gyration, polymer contour lengths, and coil conformation. Our method is expected to be applicable for a wide range of water-soluble synthetic and natural polymers and ideal for molecular masses of 5 × 103–2 × 105 g · mol-1. PB - Wiley-VCH Verl. CY - Weinheim KW - Fractionation of polymers KW - Molar mass distribution KW - Polyelectrolytes KW - Small-angle X-ray scattering KW - Water-soluble polymers PY - 2010 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/22005 AN - OPUS4-22005 SN - 1022-1352 SN - 1521-3935 VL - 211 IS - 19 SP - 2148 EP - 2153 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany