Hybridization of Poly(oxazoline) and Poly(ethylene oxide)-Based Amphiphilic Copolymers into Thermosensitive Mixed Micelles of Tunable Cloud Point.

This paper reports the development in aqueous solution of mixed micelles of tunable cloud point temperature through blending in various proportions of two copolymers of different chemical natures. For that purpose, a lipid--poly(2-isopropyl-2-oxazoline) (lipid--P(PrOx)) copolymer, self-assembling into thermosensitive micelles that phase-separate above a cloud point temperature of 38 °C, was blended in various proportions with commercial C--PEO. The latter was constituted of a hydrophobic saturated C chain and a hydrophilic poly(ethylene oxide) (PEO) block with varying polymerization degrees () and does not have any thermosensitive properties on the studied temperature range for any value of .