Polyoxyethylene–polyoxypropylene block copolymers: a novel phase transition in aqueous solutions of pluronic F87 (poloxamer 237)
Abstract
An unexpected phase transition in dilute aqueous solution of the nonionic surfactant poloxamer P237 (Pluronic F87), with an excess specific heat capacity maximum at 307.7 K in the concentration range 1–10 mg/ml, has been observed using high sensitivity differential scanning calorimetry (HSDSC); the thermodynamic parameters associated with this transition are reported.