Compatibility studies on solutions of polymer blends by viscometric and ultrasonic techniques

Detailed viscometric and ultrasonic velocity studies have been conducted on solutions of blends of poly(methyl methacrylate) with poly(vinyl acetate), poly(vinyl chloride) with poly(vinyl acetate) and poly(methyl methacrylate) with polystyrene over an extended range of concentrations and temperatures in toluene, chlorobenzene and toluene respectively. The plots of both absolute viscosity and ultrasonic velocity vs composition deviate from linearity according to the degree of compatibility of polymer blends, at all concentrations and temperatures. The curves for compatible systems are linear. These investigations offer an entirely new approach to the study of the compatibility of polymer blends.