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Emulsification is used to generate spherical particles or droplets of immiscible liquids, while block copolymer self-assembly yields a wide variety of nanostructures. The combination of these two methodologies can yield a variety of structures that would not be otherwise observed. The emulsification/solvent evaporation process provides a powerful means to direct block copolymer assembly. Various factors...
In vesicles of an ABC triblock copolymer, the soluble A and C blocks can be grafted onto the outer or the inner surfaces of the wall made of the insoluble B block. Traditionally, the determination of the fractions of A and B chain segments partitioned onto these two surfaces has been difficult. We show that they can be readily determined from NMR paramagnetic relaxation experiments. In such an experiment,...
Solubilization of various polycyclic aromatic hydrocarbon (PAH) probes by arborescent polystyrene-graft-poly(2-vinylpyridine) unimolecular micelles of different structures in aqueous solutions was investigated by UV and fluorescence spectroscopies. The micelle–water partition coefficient K w and the solubilization capacity κ G both increased with the polystyrene content of the copolymers...
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