Solution behavior of styrene–ethylene oxide block copolymers

Abstract

Abstract Hydrophobic–hydrophilic water‐soluble block copolymers were prepared by “living” anionic polymerization. They consist of a polystyrene block and a polyethylene oxide block. From data on solution viscosity and high‐resolution NMR in water, the molecular dimensions of the two‐blocks copolymers are found similar to that of polyethylene glycols of the same molecular weight in the same solvent. These block copolymers exhibit microphase separation.