Miscibility Studies of Polycarbonate/ Poly(methyl methacrylate) and Polycarbonate/Polystyrene Blends as Measured by Viscosity, Ultrasonic, and Refractive Index Methods

Abstract The ultrasonic velocity, viscosity, refractive index and density of polycarbonate/poly-(methyl methacrylate) (PC/PMMA) and polycarbonate/polystyrene (PC/PS) blends in solution have been measured at 30°C. Using the viscosity data, the interaction parameters have been computed which indicate that the PC/PMMA blend is miscible, whereas the PC/PS is immiscible. This is confirmed by ultrasonic and refractive index measurements.