| Abstract: | The phase diagram and cloud point surface for the ternary system polystyrene/polybutadiene/tetralin were determined at 29°, 87°, and 143°C. Polystyrenes and polybutadienes of narrow molecular weight distribution were used to study the effect of molecular weight on the cloud point concentration. The phase diagram obtained was bimodal. This unusual shape was more pronounced at higher molecular weights. A model describing the molecular weight dependence of the cloud point concentration was tested and found to hold over a wide composition and temperature range. |
