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
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.