We report x-ray intensity fluctuation spectroscopy measurements of the equilibrium dynamics of polymer micelle liquids, composed of polystyrene-polyisoprene block copolymer micelles within a polystyrene homopolymer matrix. The equilibrium dynamics were investigated for times between one and several hundred seconds, and for wave vectors from 0.003 to 0.015^-1, far beyond wave vectors that can be studied with visible light. A wave-vector-dependent diffusion coefficient is found.
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Mochrie et al. (1997) studied this question.
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