The following graph shows experimental demixion curves obtained in the case of cyclohexane/PS solution at different polymerization degrees (Dp) of PS (a, b and c).

1. Indicate on the graph the solubility and immiscibility areas.

2. Give the definition of the critical demixion temperature?

3. Indicate on the graph the critical demixion temperature point?

4. Determine graphically the value of the critical demixion temperature for each PS (a, b and c).

5. What is the effect of Dp on the solubility of the solution? Explain your answer.

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