Authors : Melika Ebrahimpour, Ali A. Safekordi, Amir Heydari Nasab and Seyed Mahmoud Mousavi
Abstract: Phase separation analysis of a three-component, membrane-forming system: poly (butylene succinate) (PBS)/1,1,2,2-Tetrachloethane/non-solvent is described. Cloud point data were obtained by the titration method on the ternary system diagramfrom a limited number of experiments. These curves obtained for the different non-solvents including methanol, methanol/isopropanol (50/50,v/v), isopropanol. The phase diagram for aternary system of poly (butylene succinate ) (PBS)/1,1,2,2-Tetrachloethane/non-solvent was determined by numerical calculation on the basis of the Compressible Regular Solution (CRS) Model by pure component properties such as, solubility parameter, coefficient of thermalexpansion and hard-core volume. In this respect, the binodal curve, spinodal curve and the critical point were determined by numerical calculations. Properties of components that were needed for these calculations have been taken from available data in the literature. The good agreement between the theoretical binodal and experimental cloud points indicates that this model is a promising method to calculate the theoretical phase diagram for membrane forming systems with particular attention to the fact that no adjustable parameters such as binary interaction parameters should be used for theoretical calculations. Also, the cloud point curves obtained for the above non-solvents indicated that methanol has the strongest coagulation power among them. Results show that the composition of the coagulation bath governs effectively the structure of the membranes.
Melika Ebrahimpour, Ali A. Safekordi, Amir Heydari Nasab and Seyed Mahmoud Mousavi, 2016. Phase Separation Analysis in the Ternary System of Poly (Butylene Succinate)/1,1,2,2,-Tetrachlo Ethane/Non-Solvent in Relation to Membrane Formation. International Business Management, 10: 5876-5884.