title: 3-Ethylated N-Vinyl-2-pyrrolidone with LCST Properties in Water.
abstract: The monomer 3-ethyl-1-vinyl-2-pyrrolidone (3) and the homopolymer poly(3-ethyl-1-vinyl-2-pyrrolidone) (5) have been synthesized. Polymer 5 is soluble in water and shows a critical temperature (T(c) ) of 27 °C. The presence of cyclodextrin causes a slight shift of the T(c) . The lower critical solution temperature (LCST) could be varied between 27 and 40 °C by copolymerization with N-vinyl-2-pyrrolidone. A linear correlation between the T(c) and the copolymer composition is observed.
authors.affiliation: Heinrich-Heine-Universität Düsseldorf, Institut für Organische Chemie und Makromolekulare Chemie: Lehrstuhl für Präparative Polymerchemie, 40225 Düsseldorf, Germany.
authors.forename: Taina
authors.initials: T
authors.lastname: Trellenkamp
authors.forename: Helmut
authors.initials: H
authors.lastname: Ritter