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Polymers from 1-Vinyl-2-(hydroxymethyl)imidazole in Water: Altering from UCST to LCST Behavior via O-Ethylation
Ist Teil von
Macromolecular chemistry and physics, 2014-04, Vol.215 (7), p.682-687
Ort / Verlag
Weinheim: Blackwell Publishing Ltd
Erscheinungsjahr
2014
Link zum Volltext
Quelle
Wiley Online Library
Beschreibungen/Notizen
1‐Vinyl‐2‐(methoxymethyl)imidazole (6), 1‐vinyl‐2‐(ethoxymethyl)imidazole (7), 1‐vinyl‐2‐(propoxymethyl)imidazole (8), and 1‐vinyl‐2‐(butoxymethyl)imidazole (9) are synthesized through the etherification of 1‐vinyl‐2‐(hydroxymethylimidazole) (1) with corresponding alkyl halides (2–5). Corresponding homopolymers (10–13) are synthesized via free radical polymerization and investigated concerning their temperature‐dependent solubility in water. The homopolymer 11 shows a lower critical solution temperature (LCST) behavior with a cloud point of 23 °C. Through copolymerization of 7 with N‐vinylimidazole (14), the cloud point is varied up to 42 °C.
Alkylated derivatives (6–9) of 1‐vinyl‐2‐(hydroxymethyl)imidazol (1) are synthesized through the etherifiaction of 1 with various alkyl halides (2–5). The homopolymer of the ethylated derivative shows lower critical solution temperature (LCST) behavior in water. In addition, corresponding copolymers of the ethylated derivative (7) with N‐vinylimidazole (14) are synthesized. Thereby the LCST can be varied between 23 and 42 °C.