Number of the records: 1
1H NMR study of temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers
- 1.0343295 - ÚMCH 2011 RIV GB eng J - Journal Article
Kouřilová, H. - Šťastná, J. - Hanyková, L. - Sedláková, Zdeňka - Spěváček, Jiří
1H NMR study of temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers.
European Polymer Journal. Roč. 46, č. 6 (2010), s. 1299-1306. ISSN 0014-3057. E-ISSN 1873-1945
R&D Projects: GA ČR GA202/09/1281
Institutional research plan: CEZ:AV0Z40500505
Keywords : phase-separation * poly(N-isopropylmethacrylamide) aqueous solution * poly(N-isopropylmethacrylamide-co-acrylamide) copolymer
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 2.518, year: 2010
1H NMR spectroscopy was applied to investigate temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) [P(IPMAm/AAm)] random copolymers in D2O, D2O/ethanol and D2O/acetone. For solutions of the copolymers with the AAm fraction not exceeding 16 mol% 1H NMR spectra show dynamic heterogeneity of copolymer chains in mesoglobules where AAm sequences and surrounding IPMAm sequences are hydrated and mobile, while other IPMAm sequences are dehydrated and their mobility is strongly reduced. The obtained results are consistent with the idea that P(IPMAm/AAm) copolymer mesoglobules are rather porous and disordered.
Permanent Link: http://hdl.handle.net/11104/0005905
Number of the records: 1