Isothermal Stability of Dilute Aqueous-Solutions of Block Copolymers of Poly(Oxyethylene)-Poly(Oxypropylene)-Poly(Oxyethylene) - A Microcalorimetric Study Of Pluronic-F87 And Pluronic-F88

Dilute aqueous solutions of block copolymers of poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) (pluronic F87 and pluronic F88) have been subject to an isothermal microcalorimetric study at 298 K. Thermal events consistent with a phase transition in solution are observed. Some of the thermodynamic and kinetic detail of these aging phenomena are reported, as are the consequences of the presence in solution of urea and of sodium chloride