Infinite Dilute Activity and Diffusion Coefficients in Polymers by Inverse Gas Chromatography

Abstract

The infinite dilute activity and diffusion coefficients of solvents in poly(vinyl alcohol) and cross-linked poly(vinyl alcohol) are determined by using inverse gas chromatography technique with a packed column. Experimental results for water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 1-pentanol, and 3-methyl-1-butanol in poly(vinyl alcohol); for water, methanol, and ethanol in cross-linked poly(vinyl alcohol) at different temperatures are presented. The van Deemter equation is used to obtain diffusion coefficients of solvents from the variation of chromatographic peak under the different flow rates of carrier gas. The interdependence on the infinite dilute diffusion coefficient and temperature follows Arrhenius equation well. Diffusion constant and activation energy are obtained from the Arrhenius equation.

Solution and diffusion properties of cyclohexane, cyclohexanol, and cyclohexanone in poly(ethylene glycol) by inverse gas chromatography

“…Figure 1 is a schematic of the IGC unit. 21 Nitrogen was used as the carrier gas and a small pulse of the solvent (0.1 lL) was injected into the column using a 0.5 lL syringe. The carrier gas flowed directly to the column which was enclosed in the temperature controlled oven.…”

Thermodynamic interactions of EVA copolymer‐solvent systems by inverse gas chromatography measurements

“…Among all these techniques, inverse gas chromatography (IGC) is one of the most widely used, because it gives a great deal of information with relatively simple measurements. In literature, this technique has been used with many different polymeric materials, always with good results 16, 17. Another important point is that it has been demonstrated that the obtained values with this technique (at solvent infinite dilution conditions) can be extrapolated to the overall composition range 18…”

Analyzing solubility and diffusion of solvents in novel hybrid materials of poly(vinyl alcohol)/γ-aminopropyltriethoxysilane by inverse gas chromatography

“…Inverse gas chromatography (IGC) is a simple, fast, reliable and powerful tool for the investigation of the sorption and diffusion behavior of small molecules in polymers. [21][22][23] This method can be used to determine the main sorption thermodynamic parameters of polymer-solvent systems, such as, activity coefficient, solubility coefficient, the Flory-Huggins interaction parameter and solubility parameter, partial molar excess free energy of mixture and enthalpy of sorption. [24][25][26][27][28] The infinite dilution diffusion coefficients of solvent and no-solvent in polymer can be measured exactly.…”