Macromolecules 2007, 40, 4917-4923
4917
Block Copolymer Vesicles in Liquid CO2 William F. Edmonds,† Marc A. Hillmyer,*,‡ and Timothy P. Lodge*,†,‡ Department of Chemical Engineering and Materials Science and Department of Chemistry, UniVersity of Minnesota, Minneapolis, Minnesota 55455 ReceiVed February 18, 2007; ReVised Manuscript ReceiVed May 7, 2007
ABSTRACT: Two polylactide-b-poly(perfluoropropylene oxide) (PLA-PFPO) diblock copolymers were synthesized via a coupling reaction of acid chloride end-functionalized poly(perfluoropropylene oxide) and hydroxyterminated polylactide. The solubility of these materials in CO2 was measured using a variable-volume highpressure cell. At a concentration of 1 wt %, the PLA-PFPO copolymers were found to be soluble at modest pressures (
