Dilute solutions of a three‐block styrene‐butadiene‐styrene copolymer in the mixed selective solvent tetrahydrofuran/allyl alcohol exhibit a more or less pronounced turbidity. Sedimentation analysis and light scattering reveal that these solutions contain two components, namely, a molecularly dissolved copolymer (unimer) and rather compact supermolecular aggregates (micelles) with a relatively narrow molecular weight distribution. The unimer/micelles weight ratio and the weight of micelles were determined as a function of the composition of the mixed solvent, temperature, and copolymer concentration.
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Tuzar et al. (1974) studied this question.
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