Molecular dynamics of methoxy polyoxyethylene macromonomer micelles in the absence and presence of SDS micelles using ¹H NMR spin-lattice relaxation time measurements

Abstract

Molecular dynamics studies performed by ¹H NMR spin-lattice relaxation time measurements suggest the occurrence of a mutual interaction between aqueous micelles of a macromonomer (acrylic ester of ω-methoxypolyethyleneglycol, Mol. wt. 460) and sodium dodecylsulfate (SDS). The α-CH₂ of SDS and ω-OCH₃ of the macromonomer seem to contribute to the maximum electrostatic interaction. The counterion association for SDS micelles is also hindered in the presence of larger macromonomer micelles as observed by conductivity measurements.