TY - JOUR A1 - Knappe, Patrick A1 - Bienert, Ralf A1 - Weidner, Steffen A1 - Thünemann, Andreas T1 - Characterization of poly/N-vinyl-2-pyrrolidone)s with broad size distributions T2 - Polymer N2 - We report on the characterization of the solution structure of poly(N-vinyl-2-pyrrolidone)s (PVP) by small-angle X-ray scattering (SAXS) and by online coupling of asymmetrical flow field-flow fractionation (A4F), SAXS and dynamic light scattering (DLS). The commercial products PVP K30 and PVP K90 with nominal molar masses of 40 × 103 and 360 × 103 g mol-1, respectively, were investigated separately and as binary mixture. Detailed information for all polymer fractions is available on the polymer contour lengths and the diffusion coefficients. Key areas of applications for the A4F-SAXS-DLS coupling are seen in comparison to static light scattering for polymers with radii of gyration smaller than 10 nm, for which only SAXS produces precise analytical results on the size of the polymers in solution. PB - Springer CY - Berlin KW - Small-angle X-ray scattering KW - SAXS KW - Field-flow fractionation PY - 2010 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/21222 AN - OPUS4-21222 SN - 0032-3861 SN - 1873-2291 VL - 51 IS - 8 SP - 1723 EP - 1727 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany