Abstract

Calculations of infrared difference spectra of polymer blends and pure components have been made based on models with no intermolecular bonding interactions. The results demonstrate that residual peaks can arise from optical phenomena based solely on the effects of differences in the real part of the refractive indices of the pure components. Accordingly, chemical interpretations, such as intermolecular bonding interactions, of residual difference peaks must be made with caution in blends where the real refractive indices of the components differ by several percent or more in absorption-free energy regions.

Dispersion effects on infrared spectra in attenuated total reflection

Rabah Belali, Jean-Marie Vigoureux, and Joseph Morvan
J. Opt. Soc. Am. B 12(12) 2377-2381 (1995)

Conjugated polymer-fullerene blend with strong optical limiting in the near-infrared

San-Hui Chi, Joel M. Hales, Matteo Cozzuol, Charles Ochoa, Madison Fitzpatrick, and Joseph W. Perry
Opt. Express 17(24) 22062-22072 (2009)

The Infrared Absorption Spectra of Mixtures of Alcohol and Water

Dudley Williams, R. D. Weatherford, and E. K. Plyler
J. Opt. Soc. Am. 26(4) 149-152 (1936)

Homogeneous polymer blend microparticles with a tunable refractive index

M. D. Barnes, C.-Y. Kung, N. Lermer, K. Fukui, B. G. Sumpter, D. W. Noid, and J. U. Otaigbe
Opt. Lett. 24(3) 121-123 (1999)

Component spectra extraction from terahertz measurements of unknown mixtures

Xian Li, D. B. Hou, P. J. Huang, J. H. Cai, and G. X. Zhang
Appl. Opt. 54(30) 8925-8934 (2015)