Infrared spectra of high polymers. V. Polyvinyl alcohol

Abstract

The infrared spectrum of polyvinyl alcohol has been investigated between 3600 and 70 cm.−1. Polarization measurements on stretched specimens were made down to about 330 cm.−1. The spectrum of a deuterated specimen (about 90% of the OH having been replaced by OD) has also been obtained. These data confirm and extend the results of previous workers. The spectrum is discussed in detail in relation to three structures for polyvinyl alcohol proposed on the basis of x‐ray diffraction studies. The data definitely rule out the structure proposed by Mooney, and are most consistent with the structure proposed by Bunn. A complete assignment of the bands in the spectrum is proposed. From this analysis it appears that the existence of interaction forces between molecules can be convincingly demonstrated. The proposed assignments suggest a new interpretation of the 1326–1446 cm.−1 doublet, viz., that these bands arise from mixed CH and OH in‐plane bending vibrations. This is shown to be in agreement with the results of studies on simple alcohols. An alternative assignment for the 1144 cm.−1 band is also considered.

Spectroscopic analysis of CdCl2 doped PVA–PVP blend films

“…The band at 1733 cm -1 corresponds to carbonyl stretching of acetyl group of unhydrolyzed PVA (i.e., partially hydrolyzed portions of PVA molecules) [37], and that at 1665 cm -1 corresponds to carbonyl (C=O) group of PVP [38]. The dominant peak at 1665 cm -1 (in fig.3) confirms that PVP is more interactive (with CdCl 2 ) when compared with PVA.…”

Spectroscopic Study of Ethylene Vinyl Alcohol Copolymer and Poly(vinyl alcohol).

“…(1-3) and poly (vinyl alcohol) (PVOH) (4,5) have been studied for many years. On the other hand, ethylene vinyl alcohol copolymer (EVOH) can not be understood well.…”

Preparation of Novel Polymer Hybrids from Imogolite Nanofiber

“…The characteristic absorption peaks of PVA were appeared at 2945 cm À1 : a (CH 2 ), 2915 cm À1 : s (CH 2 ), 1430 cm À1 : (CH 2 ), and 1095 cm À1 : (C-O). 49 In addition, the IR spectra of the hybrid with imogolite showed two sharp peaks corresponding to the Si-O-Al stretching vibration, which were the same as those shown by the synthesized imogolite. (Curve 4) The IR spectra of the natural imogolite/PVA and synthetic imogolite/PVA hybrid materials are quite similar to that of the PVA powder, except for the characteristic imogolite absorptions at 995 and 930 cm À1 .…”