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Optical properties of emeraldine salt polymers from ab initio calculations: Comparison with recent experimental data

Article Abstract:

The absorption coefficient [alpha]([omega]), the transverse dielectric function [epsilon]([omega]), the optical conductivity [sigma]([omega]) and the reflectance R([omega]) calculated for an emeraldine salt conducting polymer in its crystalline 3-dimensional (3D) polaronic structure is presented. Kohn-Sham density functional theory (DFT) electronic wave functions and energies are implemented in the expression of the macroscopic transverse dielectric function in the framework of the band theory without the electron-hole interaction.

Density functionals, Density functional theory, Atomic properties, Holes (Electron deficiencies)

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High-pressure CO(sub 2)-expanded solvents: Simultaneous measurement of CO(sub 2) sorption and swelling of liquid polymers with in-situ near-IR spectroscopy

Article Abstract:

In-situ near-infrared (NIR) spectroscopy was used to simultaneously measure the sorption of high-pressure CO(sub 2) and the swelling of poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG). The results obtained showed that NIR transmission spectroscopy is a reliable method for studying the phase behavior of liquid solvents subjected to high-pressure or supercritical CO(sub 2).

Near infrared spectroscopy, Polyethylene glycol

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Intermolecular interactions as controlling factor for water sorption into polymer membranes

Article Abstract:

The mechanism to control water sorption into modified block co-poly-(ether/amide) (PEBAX) membranes by employing a multidisciplinary approach is demonstrated.

Ethers, Ethers (Class of compounds), Amides

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