| Abstract: | Starting from the Flory-Huggins theory applied to a polymer/polymer/solvent solution, an expression has been derived showing the overall effect of solvent on the composition of the polymer blend in the final solid state. This expression has been experimentally verified by investigating the miscibility of two polymer blends: polystyrene/poly(α-methylstyrene) cast from tetrahydrofuran and cyclohexane, and polystyrene/poly (methyl methacrylate) obtained from tetrahydrofuran and chloroform. Besides the usual differential scanning calorimetry technique, thermogravimetric analysis might be helpful for detecting the miscibility of polymer blends. |
