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About the size of it: A series of polystyrene-block-poly(acrylic acid) (PS-b-PAA) block copolymers were developed in which the length of the PAA block was kept constant and the length of the PS block was varied. This allowed a study of the effect of the PAA/PS block ratio on the vesicle sizes as well as on the wall thicknesses.
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Azzam et al. (2006) studied this question.
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