Effect of water-soluble polymers, polyethylene glycol and poly(vinylpyrrolidone), on the gelation of aqueous micellar solutions of Pluronic copolymer F127

► Gelation of aqueous micellar solutions of Pluronic copolymer F127. ► Addition of polyethylene glycol (PEG) increases the critical gel concentration (cgc). ► Addition of poly(vinylpyrrolidone) (PVP) may decrease the cgc. ► The elastic modulus of the gel is much reduced on adding PEG, less so on adding PVP. ► 30 wt% F127 gel has the face-centered cubic structure for both polymers.