Open AccessInfrared spectroscopic study of the interactions of nylon‐6 with water
Author(s) -
Iwamoto Reikichi,
Murase Hiroshi
Publication year - 2003
Publication title -
journal of polymer science part b: polymer physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.65
H-Index - 145
eISSN - 1099-0488
pISSN - 0887-6266
DOI - 10.1002/polb.10526
Subject(s) - hydrogen bond , amide , amorphous solid , chemistry , spectral line , infrared spectroscopy , dehydration , fourier transform infrared spectroscopy , infrared , crystallography , hydrogen , polymer chemistry , analytical chemistry (journal) , molecule , organic chemistry , physics , optics , astronomy , biochemistry
We studied the interactions of nylon‐6 with water by following the Fourier transform infrared spectra of a hydrated thin film during dehydration. Very small changes in the spectra caused by the interactions were clearly revealed by the application of spectral subtraction. The water was found to interact with amide groups to form hydrogen bonds with non‐hydrogen‐bonded or free CO and NH groups in the amorphous portion in the first hydration sphere. This was deduced from an analysis of minus and plus peaks appearing around the absorptions of the NH stretching, amide I band, and amide II bands in the difference spectra between the spectra during dehydration and the one at the most dehydration. The interactions of the amide groups with water were significantly stronger than the hydrogen bond between CO and NH in the crystalline portion, according to the magnitude of the frequency shift of relevant bands. Water, as the interacting counterpart, showed a distorted OH stretching absorption with two close peaks at about 3450 cm −1 . © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1722–1729, 2003