Self-Association in Water of Copolymers of Sodium 2-(Acrylamido)-2-methylpropanesulfonate and N-Oleylmethacrylamide Characterized by Fluorescence Quenching

Abstract

Associative properties of copolymers of sodium 2-(acrylamido)-2-methylpropanesulfonate (AMPS) and N-oleylmethacrylamide (OleMAm) with varying OleMAm content (fOle) in aqueous solutions were characterized by fluorescence quenching using naphthalene-labeled polymers. Fluorescence emitted from naphthalene labels was quenched when the labels were incorporated in hydrophobic microdomains formed from oleyl groups. It was thus possible to monitor the formation of hydrophobic microdomains and hence the self-association behavior of polymers via fluorescence quenching. The self-association of oleyl groups occurred progressively from fOle=3 to 20 mol%, as in the case of copolymers of AMPS and N-octadecylmethacrylamide, a methacrylamide N-substituted with a saturated alkyl chain of the same length as the oleyl group. Time-dependent fluorescence and absorption spectral data suggested that the cis double bonds in the oleyl groups from a cluster when the polymer-bound oleyl groups associate to form hydrophobic microdomains. Quasielastic light scattering data indicated that the AMPS-OleMAm copolymers had a stronger tendency for intrapolymer association than copolymers of AMPS and N-octadecylmethacrylamide.

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Yamamoto, H., Hashidzume, A. & Morishima, Y. Self-Association in Water of Copolymers of Sodium 2-(Acrylamido)-2-methylpropanesulfonate and N-Oleylmethacrylamide Characterized by Fluorescence Quenching. Polym J 32, 737–744 (2000). https://doi.org/10.1295/polymj.32.737

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Keywords

  • Amphiphilic Polyelectrolytes
  • Self-Association
  • Hydrophobic Association
  • Unimolecular Micelles
  • Sodium 2-(Acrylamido)-2-methylpropanesulfonate
  • N-Oleylmethacrylamide
  • Fluorescence Quenching

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