Poly(acrylic acid): A Combined Analysis with Field-Flow Fractionation and SAXS

✍ Scribed by Patrick Knappe; Ralf Bienert; Steffen Weidner; Andreas F. Thünemann

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 278 KB
• Volume: 211
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.201000163

✦ Synopsis

Abstract

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 × 10^3^–2 × 10^5^ g · mol^−1^.
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