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Hydration of Temperature‐Responsive Polymers Observed by IR Spectroscopy
Author(s) -
Maeda Yasushi
Publication year - 2011
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201150509
Subject(s) - polymer , hydrogen bond , alkyl , amide , aqueous solution , infrared spectroscopy , polymer chemistry , spectroscopy , molecule , chemistry , phase (matter) , materials science , chemical physics , organic chemistry , physics , quantum mechanics
Summary: Phase separation of aqueous solutions of temperature‐responsive polymers such as poly( N ‐isopropylacrylamide) (PNiPAm) and poly( N,N ‐diethylacrylamide) (PdEA) was investigated. IR spectroscopy was proved to be a quite useful method observing changes in the hydration states of individual chemical groups of the polymers. For example, the analyses of the amide I and II bands provides important information concerning the hydrogen bonding of the CO group and the N‐H group, respectively. Changes in the CH stretching bands indicate hydration changes of the alkyl groups. In addition, molecular simulations based on quantum chemistry give a strong support to the interpretation on molecular level. Our recent progress on this subject was presented and the relationship between the molecular interactions and the macroscopic phase behaviors was discussed.