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A well-defined poly(4-vinyl phenol)-block-polystyrene (PVPh-b-PSt) diblock copolymer was prepared by 2,2,6,6-tetramethylpiperidinyl-1-oxy-mediated living radical polymerization. The block copolymer dissolved only in good solvents for both poly(4-vinyl phenol) and polystyrene blocks. This nonamphiphilic PVPh-b-PSt copolymer showed micellization in the solvents in the presence of α,ω-diamines. Dynamic light scattering demonstrated that PVPh-b-PSt with 9610-b-68,800 as the molecular weight formed micelles with 25–30-nm hydrodynamic radii in the presence of ethylenediamine, 1,4-butanediamine, or hexamethylenediamine. Steric hindrance in diamines and excessively long chains between amino groups prevented micellization of the copolymer.
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Yoshida et al. (2002) studied this question.
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