2009
DOI: 10.1002/marc.200900250
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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.

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Cited by 24 publications
(31 citation statements)
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“…Especially polymers having a lower critical solution temperature (LCST) in water, like poly( N -isopropylacrylamide) or modified poly( N -vinylpyrrolidone) are extensively described in literature [45]. Below the critical temperature ( T C ) these polymers are soluble and they become insoluble by heating their solutions above the T C .…”
Section: Introductionmentioning
confidence: 99%
“…Especially polymers having a lower critical solution temperature (LCST) in water, like poly( N -isopropylacrylamide) or modified poly( N -vinylpyrrolidone) are extensively described in literature [45]. Below the critical temperature ( T C ) these polymers are soluble and they become insoluble by heating their solutions above the T C .…”
Section: Introductionmentioning
confidence: 99%
“…Thereby, the electron-rich double bond of N -VP is stable towards nucleophilic attack of the resulting carbanion intermediates. Some alkylated N -VP-based monomers can be used as agents in click chemistry [17] to obtain thermo- [18] or/and pH [19] responsive polymers. Besides classical alkylation reactions, Reinecke et al performed ring-opening reactions to insert functional groups and aromatic side chains [2021].…”
Section: Introductionmentioning
confidence: 99%
“…Since the double bond of N ‐VP is electron rich, nucleophilic displacement reactions can be performed without attacking the N ‐vinyl group. In this connection, we recently mono‐ethinylated N ‐VP to achieve lower critical solution temperature properties in water . We also attached cyclodextrin azide covalently to ethinylated N ‐VP via a click reaction .…”
Section: Introductionmentioning
confidence: 99%