Non-Ionic Homo- and Copolymers with H-Donor and H-Acceptor Units with an UCST in Water

Titelangaben

Seuring, Jan ; Agarwal, Seema:
Non-Ionic Homo- and Copolymers with H-Donor and H-Acceptor Units with an UCST in Water.
In: Macromolecular Chemistry and Physics. Bd. 211 (2010) Heft 19 . - S. 2109-2117.
ISSN 1521-3935
DOI: https://doi.org/10.1002/macp.201000147

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Abstract

A well-studied example of a thermoresponsive polymer is PNiPAAm, which exhibits a sharp coil-to-globule transition in water at its LCST. A study relating to the missing counterpart of LCST polymers is presented: N-acryloylglycinamide (NAGA) homopolymer and copolymers from NAGA and N-acetylacrylamide (NAcAAm) that show a sharp UCST (where the sharpness depends on the composition). The polymers were synthesized by free-radical copolymerization and the copolymerization parameters were determined by the method of Kelen-Tüdös. The UCST was investigated by turbidimetry, regarding the influence of the copolymer composition, the polymer concentration and the addition of electrolytes.