Physical and rheological characterisation of polyethylene glycol–cashew-nut tree gum aqueous two-phase systems

The characterisation of the polyethylene glycol–cashew-nut tree gum aqueous two-phase system is described. Factors which affect the phase diagram including polymer molecular mass, pH and temperature were analysed. The physico–chemical properties of the system such as density, viscosity, volume ratio and phase separation times were also described. The characteristics of the system studied indicate it to be very attractive as a separation technique.