Various functional groups random polymerizations

Stars have been made with various functional groups. These include hydroxyl, acid, amine, epoxy, and reactive double bonds. The functional group can be incorporated randomly in the arm, in blocks, in the core, or at the end of the arms. The easiest way to functionalize the ends of the arms is to use a functional Initiator. Of course functional groups that contain active hydrogens, such as hydroxyl and acid, need to be protected during the GTP reaction. The blocking groups can be removed after polymerization is complete. 

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