Miscibility studies on polystyrene poly (methylmethacryalte)‎ blends by dilute solution viscometry

الملخص EN

Miscibility of Polystyrene (PS) with Poly (methylmethacrylite) was studied in dilute solution by viscometers.

Blends with PS/PMMA composition of 0.1 / 0.9, 0.3 / 0.7, 0.5 / 0.5, 0.7 / 0.3, and 0.9 / 0.1 were studied at 20°C and 30°C in Tetrahydrofuran (THF) solvent.

The intrinsic viscosity and the viscometric interaction parameter have been determined for the binary (solvent / polymer) and ternary (solvent / polymer1 / polymer2) systems.

The degree of compatibility of these polymer systems was estimated on the basis of the following six criteria: (1) the sign of Δ [η].

(2) The sign of Δb23, (3) the sign of μ, (4) the sign of Δ BM, (5) the sign of α, and (6) the sign of β.

Based on sign convention involved in these criteria, partial miscibility was observed in the PS / PMMA system.

Miscibility between PS and PMMA was found to increase with temperature from 20°C to 30°C and decrease with weight fraction of PS.