Abstract
Molecular simulation of amphiphilic (AB)n star diblock copolymers in dilute solution shows that the properties of the polymer are significantly affected by which of the ends of the diblock arm is attached to the center of the star. In dilute aqueous solution, stars having the solvophilic end of the diblock attached to the center of the star can undergo a dramatic conformational change in which the outer solvophobic blocks aggregate into one or more compact solvophobic globules. This aggregation transition is accompanied by a significant change in the size of the polymer as measured by the radius of gyration.
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