Abstract
To study the effect of the structural factors of hydrophobic residues in amphiphilic polyelectrolytes on self-aggregation and on the nature of hydrophobic microdomains thus formed in aqueous solution, copolymers of sodium 2-acrylamido-2-methylpropanesulfonate (AMPS) with various hydrophobic monomers such as 1-vinylpyrene, 9-vinylphenanthrene, cholestanyl methacrylate, and lauryl methacrylamide were synthesized. The microphase separation of these copolymers to form micelle-like hydrophobic domains in aqueous solution was evidenced by viscosity behavior, the line broadening of 1H NMR absorption peaks, the surface tension of the aqueous solutions, and the morphology of cast films. The copolymers with aromatic hydrophobic residues (pyrenyl or phenanthryl groups) were more able to self-aggregate than those with aliphatic hydrophobic residues (lauryl or cholestanyl groups). In the hydrophobic microdomains the aromatic residues tend to be more tightly packed than are the aliphatic residues.
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Morishima, Y., Kobayashi, T. & Nozakura, Si. Amphiphilic Polyelectrolytes with Various Hydrophobic Groups: Intramolecular Hydrophobic Aggregation in Aqueous Solution. Polym J 21, 267–274 (1989). https://doi.org/10.1295/polymj.21.267
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DOI: https://doi.org/10.1295/polymj.21.267
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