Gas-Chromatographic Studies on the Compatibility of Pvc with a Migration Resistant Plasticizer
(EN)
Demertzis, P. G.
(EN)
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
(EL)
Demertzis, P. G.
(EN)
The technique of inverse gas chromatography (IGC) was used to investigate the thermodynamic miscibility (compatibility) of low molecular weight PVC-poly(adipate ester) plasticizer mixtures. The polymer-plasticizer thermodynamic interaction parameters were determined from chromatographic retention data for various low molecular weight volatile solutes (probes) on stationary phase mixtures which covered the entire composition range for each component. Experiments were carried out in the temperature range of 90 to 110-degrees-C. The Flory-Huggins interaction parameter (chi-23+) values were found to be dependent on the chemical nature of the probes, the temperature, and the composition of the mixed phase. The results predict a relatively high polymer-plasticizer compatibility for a wide range of polymer-plasticizer mixtures (up to approx. 70 wt.-% of plasticizer). Results were also compared to our own previous data using high molecular weight PVC.
(EN)
