Abstract
Poly(ethylene oxide) polymers end-capped with n-hexadecyl groups are members of a class of water-soluble polymers which associate at modest concentrations and impart unusual rheological properties to aqueous solutions. We have used pyrene(Py) as a fluorescent probe to study the association process. For each of two samples of these polymers (M w =40 000,47 000) in water, we find that above a critical polymer concentration the pyrene fluorescence shows a large increase in intensity and mean lifetime
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