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The interaction between poly(methymethacrylate) (PMMA) and poly(vinyl chloride) (PVC) has been studied indilute urea solutions of dimethylformamide (DMF) at 28℃ using a dilute solution viscometry method. The results show thatthe polymer mixtures are compatible in DMF solution in the absence of urea. The influence of urea addition on the degree ofcompatibility of the polymer mixtures has been studied in terms of the compatibility parameters (△b_m and △[η]_m). It wasfound that the compatibility of the polymer mixtures is decreased with increasing urea addition, passing through a minimumat 0.5 M urea.
The interaction between poly (methymethacrylate) (PMMA) and poly (vinyl chloride) (PVC) has been studied indilute urea solutions of dimethylformamide (DMF) at 28 ° C using a dilute solution viscometry method. The results show that the polymer mixtures are compatible in DMF The influence of urea addition on the degree of compatibility of the polymer mixtures has been studied in terms of the compatibility parameters (Δ b_m and Δ [η] _m). It wasfound that the compatibility of the polymer mixtures is decreased with increasing urea addition, passing through a minimumat 0.5 M urea.