1H NMR study of phase transition of uncharged and negatively charged poly(N-isopropylmethacrylamide) in D2O solutions

0189338 - UMCH-V 20033293 RIV DE eng J - Článek v odborném periodiku
Starovoytova, L. - Spěváček, Jiří - Hanyková, L. - Ilavský, Michal
1H NMR study of phase transition of uncharged and negatively charged poly(N-isopropylmethacrylamide) in D2O solutions.
Macromolecular Symposia. Roč. 203, - (2003), s. 239-246. ISSN 1022-1360.
[International Conference on Polymer-Solvent Complexes and Intercalates /4./. Prague, 22.07.2002-25.07.2002]
Grant CEP: GA AV ČR IAA4050209
Výzkumný záměr: CEZ:AV0Z4050913
Klíčová slova: effect of ionization * lower critical solution temperature * NMR
Kód oboru RIV: CD - Makromolekulární chemie
Impakt faktor: 0.895, rok: 2003

1H NMR spectroscopy has been applied to the analysis of dynamic-structural changes during temperature-induced phase transition of non-ionized poly(N-isopropylmethacrylamide) and ionized copolymers of N-isopropylmethacrylamide with sodium methacrylate, all in D2O solutions with various polymer concentrations (c=0.1-10 wt.-%) and ionic comonomer mole fractions (i=0-10 mole %). It was found that the formation of compact globular-like structures during the phase transition is independent of polymer concentration for non-ionized samples; the presence of negative charges on the polymer chains leads to a dependence of the phase transition temperature on c and i.
Trvalý link: http://hdl.handle.net/11104/0085161