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Raman spectroscopic study on water in aqueous solutions of temperature‐responsive polymers: Poly( N ‐isopropylacrylamide) and poly[ N ‐(3‐ethoxypropyl)acrylamide]
Author(s) -
Terada Takahiko,
Inaba Taro,
Kitano Hiromi,
Maeda Yasushi,
Tsukida Noriaki
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950922
Subject(s) - raman spectroscopy , polymer , aqueous solution , poly(n isopropylacrylamide) , polymer chemistry , acrylamide , materials science , chemical engineering , lower critical solution temperature , chemistry , monomer , copolymer , composite material , physics , optics , engineering
A Raman spectroscopic study on property changes of water in the course of a temperatureresponsive solution‐aggregate transition phenomenon of aqueous poly( N ‐isopropylacrylamide) and poly[ N ‐(3‐ethoxypropyl)acrylamide] solutions was carried out. Upon the transition of polymers from coil to globule followed by the aggregation of individual polymer chains, the height ratio of the the peaks at 3250 and 3 400 cm −1 , corresponding to the OH stretching of water molecules, was drastically changed. Contribution of small water domains included in polymer aggregates (so‐called interstitial water) to the change in the Raman spectra was suggested. Effects of polymer concentration and molecular weight of polymers on the spectra were also examined.