Temperature-induced aggregation in aqueous solutions of pluronic F68 triblock copolymer containing small amount

摘要

The temperature- and concentration-dependent aggregation of EO_(78)PO_(30)EO_(78) triblock copolymer in aqueous solutions has been studied in the concentration range from 5 to 200 g/dm~3 at 25 deg C, 45 deg C and 60 deg C. The influence of o-xylene on the micellization was measured at various (from 5 to 40) molar ratio of additive to polymer. The aggregates were described as polydisperse spheres with tethered Gaussian polymer chains. The results of the least-squares fit is briefly discussed.