| 초록 |
Cyclic polymers attract interest because of their unique chemical and physical properties arising from their topological constraints of their chain conformations and absence of chain ends. Here, we report the synthesis of discrete cyclic block copolymers. Phenyllactic acid and allyl glycolic acid were used to synthesize discrete homopolymers and oligomers. The resulting discrete polymers were linked to form block copolymers, followed by functionalization of chain ends for the copper-catalyzed azide-alkyne cycloaddition. The resulting linear and cyclic block copolymers were purified by using preparative size-exclusion chromatography and analyzed by GPC, NMR, and MALDI-TOF. Poly(ethylene glycol) (PEG) was used to form tadpole-shaped amphiphilic block copolymers. We describe the effect of molecular weight and topology of the polymer chains on the morphology of the self-assembled structures of these monodisperse block copolymers. |
