Determination of polymer–polymer interaction parameters using inverse gas chromatography

Abstract

ABSTRACT:A modified method is discussed that is based on Farooque and Deshpande's method to obtain polymerpolymer interaction parameters using inverse gas chromatography (IGC) data. In the Farooque and Deshpande method, the ratio of the difference of probe-polymer interaction parameters between two polymers and the probe volume [( 12 Ϫ 13 )/V 1 ] is used as the abscissa. In the modified method, the ratio [( 2 12 ϩ 3 13 )/V 1 ] is used as the abscissa. Experimental data previously reported for a poly(⑀-caprolactone)-polyepichlorohydrin (PCL/PECH) blend and a poly(ethyl acrylate)-poly(vinyl propionate) (PEA/PVPr) blend are analyzed. It is found that the slopes obtained by the new method had smaller deviations from the theoretical values than the Farooque and Deshpande method. The standard deviations of both slopes and intercepts obtained from the new method are also smaller. Using the new method, the polymer-polymer interaction parameters obtained from the intercept are negative numbers for the PCL/PECH system and very small positive numbers for PEA/PVPr. Explanations are given for the probe and concentration dependency of the polymer-polymer interaction parameters that are generally observed in IGC studies. A new method for selecting the best probe for calculating the interaction parameter is discussed.

Inverse Gas Chromatography in Characterization of Composites Interaction

“…As the reference volume they used molar volume of the smallest repeated unit of polymer. Jan-Chan Huang [Huang, 2003] and with R. Deanin [Huang & Deanin, 2004] Jan-Chan Huang [Huang, 2006] used also solubility parameter model to the study of the miscibility and thermodynamic properties of solutions by means of IGC. Because polymerpolymer mixtures have little entropy of mixing, the miscibility is largely decided by the sign of the heat of mixing.…”

Interaction Parameters of Surfactant Mixtures by Inverse Gas Chromatography

“…In order to solve this problem, different methods have been proposed. The Farooque and Deshpande (Farooque, & Deshpande, 1992) and the Huang (Huang, 2003a(Huang, , 2003b methodologies will be applied to retention data obtained from the use of surfactant anhidrous mixtures in order to carry out a comparative analysis of the behaviour of these methodologies in the determination of surfactant-surfactant interaction parameters.…”

“…In order to solve this problem, different methods have been proposed (El-Hibri, et al, 1988;Etxeberria, et al, 1994Etxeberria, et al, , 2000Farooque, & Deshpande, 1992;Huang, 2003aHuang, , 2003bProlongo, et al, 1989;Zhao, & Choi, 2001). …”

“…Huang's later proposal (Huang, 2003a(Huang, , 2003b based on a methodology similar to the latest has been applied to several systems and has been compared with the previous methodology using retention data in polymer materials (Benabdelghani, et al, 2006).…”

Properties of materials as determined by inverse gas chromatography

“…χ can be related to the probe-polymer interaction parameters and the polymer-polymer interaction parameter by the following equation [23]:…”