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3-Ethylated N-Vinyl-2-pyrrolidone with LCST Properties in Water
Taina Trellenkamp1, Helmut Ritter
1Heinrich-Heine-Universität Düsseldorf, Institut für Organische Chemie und Makromolekulare Chemie: Lehrstuhl für Präparative Polymerchemie, 40225 Düsseldorf, Germany.
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.
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