holder

The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.


Application of Generalized Two-Dimensional Infrared Correlation Spectroscopy to the Study of a Hydrogen-Bonded Blend

Volume 58, Number 9 (Sept. 2004) Page 1074-1081

Huang, He; Malkov, Serghei; Coleman, Michael M.; Painter, Paul C.


In the preceding studies in this series, generalized two-dimensional (2D) infrared correlation spectroscopy has been applied to the study of polymer blends with relatively weak intermolecular interactions. In this paper, a miscible system with strong intermolecular interactions, hydrogen-bonded blends of poly(4-vinyl phenol) (PVPh) and poly(methyl methacrylate) (PMMA), is considered. It has been found that band positions in 2D plots are dependent on the data sets used, due to large peak shifts and/or bandwidth changes. This observation complements our preceding studies, in which it was found that new features correspond to maxima, minima, or points of inflection in the difference spectra used to generate the 2D plots and are not normal modes of vibration of specific functional groups. Great care needs to be taken in order not to interpret artifacts of the procedure in terms of new spectroscopic features.