Intermolecular interactions play a major role in the mixing of two polymers. In certain cases, where these interactions are particularly strong, polymer complexes with simple stoichiometries may be formed. Many polymer mixtures of this type are insoluble and infusible, which complicates simple transmission infrared studies. In this note we present preliminary results on studies performed on poly(vinyl phenol) mixtures with poly(2-vinyl pyridine) using diffuse reflectance and conventional transmission infrared spectroscopies together with thermal analysis. Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy appears particularly useful in studies of these polymer complexes.
Joon Y. Lee, Eric J. Moskala, Paul C. Painter, and Michael M. Coleman, "The Application of DRIFT Spectroscopy to Polymer Complexes," Appl. Spectrosc. 40, 991-994 (1986)