Construction of Ternary Phase Diagrams for Selection of Region Used in PVAc/PU Membranes Preparation

Numbers of membranes are manufactured from the blend of two polymers and a solvent from evaporation method. The final properties of membranes are controlled by each polymer and solvent used. The selection of appropriate solvent used is important in making membranes with specific properties. Formation of homogeneous systems in development of microphase is important in the membrane performance. In this work, a ternary phase diagram of Poly(vinyl acetate)(PVAc)/Polyurethane(PU) with THF, DMF and Chloroform solvents were constructed and it has been used to arrive at an experimentally useful region for construction of membranes from PVAc/PU system. From these solvents. Phase diagrams of PVAc/PU/solvent were obtained in both 25 and 35 °C. This method is useful in the membrane researches and membrane manufacturing

Keywords:

PVAc-PU , Membranes , Phase diagram , Homogeneous system , Microphase formation