Three‐block copolymers poly[styrene‐b‐(ethene‐co‐butene)‐b‐styrene], where the middle aliphatic block amounts to about 70 wt.‐%, form micelles in 1,4‐dioxane with an aliphatic core and a polystyrene shell. The basic characteristics concerning the ratio unimer/micelles, the micellar molar mass, the radius of gyration, and the hydrodynamic radius were determined by combining the results of light scattering, small‐angle X‐ray scattering, photon correlation spectroscopy, osmometry, and viscometry. The characteristics of the micelles, approximated by the model of concentric spheres, were calculated from the data of light scattering and small‐angle X‐ray scattering. From a comparison of the geometric and hydrodynamic dimensions of the micelles it follows that in dilute solutions they behave like rigid spheres.
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Tuzar et al. (1983) studied this question.
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