Synthesis of Amphiphilic Symmetrical ABA Triblock Copolymers PS-b-PEG-b-PS Using a Bifunctional Macro RAFT Agent

摘要

This study involves the synthesis, characterization and study of selfaggregation of PEG-based amphiphilic triblock copolymers. PEG based difunctional macro RAFT agents were synthesized and characterized. PS-b-PEG-b-PS block copolymers were synthesized via the RAFT controlled free radical polymerization using the synthesized PEG dual macro RAFT agents. The content of polystyrene blocks on the triblocks was varied from 12% to 36% (based on molecular weight increase), adjusting the synthetic conditions. The triblocks self-aggregate in Dioxane-Water mixtures in sizes depending on the water content.