| 초록 |
"Comb-coil" type block copolymers(CCBCP) having an A-b-B-g-C type architecture are considered as a class of hybrid block copolymers that have the structural characteristics of both linear diblock copolymers and densely grafted polymers. In this study, a series of well defined comb-coil block copolymer polystyrene-b-poly(2-(2-bromopropionyloxy)styrene-g-poly (methyl methacrylate)(PS-b-PBPS-g-PMMA) was synthesized by atom radical transfer radical polymerization(ATRP). The linear diblock copolymers consisting of initiating sites on a specific block was obtained by ATRP of 4-acetoxystyrene, followed by activators regenerated by electron transfer for ATRP(ARGET ATRP) of styrene, and deprotection and esterification. Grafting of PMMA via ATRP yielded the desired complex architecture. Thin film of PS-b-PBPS-g-PMMA were prepared by spin coating, thermal annealing and etching process. Phase separation behavior of synthesized polymers was investigated by SEM and AFM. |
