In:
Journal of Polymer Science Part A: Polymer Chemistry, Wiley, Vol. 54, No. 18 ( 2016-09-15), p. 2845-2854
Kurzfassung:
Poly(2‐ureidoethylmethacrylate) (PUEM n ) was synthesized via reversible addition‐fragmentation chain transfer (RAFT) radical polymerization and following polymer reaction. We prepared two PUEM n samples with different degrees of polymerization ( n = 100 and 49). The polymers exhibited upper critical solution temperature (UCST) in phosphate‐buffered saline (PBS) solution. The phase separation temperature ( T p ) in PBS can be controlled ranging from 17 to 55 °C by changing molecular weight of the polymer, polymer concentration, and adding NaCl concentration. The polymers in PBS formed coacervate drops by liquid–liquid phase separations below T p . Results of the dielectric relaxation measurement, the hydration number per monomeric unit was 5 above T p . Based on a fluorescence study, the polymer formed slightly hydrophobic environments below T p . The liquid–liquid phase separation was occurred presumably because of weak hydrophobic interactions and intermolecularly hydrogen bonding interactions between the pendant ureido groups. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54 , 2845–2854
Materialart:
Online-Ressource
ISSN:
0887-624X
,
1099-0518
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2016
ZDB Id:
3004641-5
ZDB Id:
1473076-5
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