Maßgeschneiderte nichtionische Polymere mit UCST Phasenübergängen in Wasser und in wässrigen Polyelektrolytlösungen

• Antragstellerinnen / Antragsteller: Professorin Dr. Seema Agarwal; Professor Dr. Matthias Karg
• Fachliche Zuordnung: Präparative und Physikalische Chemie von Polymeren
• Förderung: Förderung von 2015 bis 2019
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 270259432

• Erstellungsjahr: 2021

Zusammenfassung der Projektergebnisse

Several tailor-made, non-ionic polymers based on monomers containing primary amide groups in the side-chain were prepared by radical polymerization with an aim to realize new thermoresponsive systems that feature an upper critical solution temperature-type (UCST-type) phase transition behavior. The influence of the monomer structure, glass transition temperature, copolymer composition, and concentration on the phase transition behavior (transition type, hysteresis, and cloud points) were studied by different analytical methods. Investigation of the phase transition behavior on different length and time scales was carried out using light and neutron based scattering methods.

Projektbezogene Publikationen (Auswahl)

• LCST and UCST in One: Double Thermoresponsive Behavior of Block Copolymers of Poly(ethylene glycol) and Poly(acrylamide-coacrylonitrile), Langmuir 2015, 31 (32), 8940
  F. Käfer, Fangyao L. Ullrich Stahlschmidt, V. Jerome, R. Freitag, M. Karg, S. Agarwal
  (Siehe online unter https://doi.org/10.1021/acs.langmuir.5b02006)
• Tunable, Concentration-Independent, Sharp, Hysteresis-Free UCST Phase Transition from Poly(N-Acryloyl Glycinamide-Acrylonitrile, J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 274
  F. Käfer, A. Lerch, S. Agarwal
  (Siehe online unter https://doi.org/10.1002/pola.28374)
• Let There be Light: Polymeric Micelles with Upper Critical Solution, Small 2018, 1802420
  Y. Deng, F. Käfer, T. Chen, Q. Jin, J. Ji, S. Agarwal
  (Siehe online unter https://doi.org/10.1002/smll.201802420)
• Tuning the Phase Transition from UCST‐Type to LCST‐Type by Composition Variation of Polymethacrylamide Polymers, Macromol. Rapid Commun. 2018, 39, 1800640
  F. Käfer, M. Pretscher, S. Agarwal
  (Siehe online unter https://doi.org/10.1002/marc.201800640)
• Interpenetrating Thermophobic, Thermophilic Dual Responsive Network, J. Polym. Sci. Part A: Polymer Chemistry 2019, 57, 539
  F. Käfer, Y. Hu, Y.J. Wang, Z. L. Wu, S. Agarwal
  (Siehe online unter https://doi.org/10.1002/pola.29292)