Abstract
The demixing behaviour of polystyrene fractions in binary combinations of acetone (1) and a series of n-alkanes (2) containing up to twenty carbon atoms has been established and the data presented as phase contour diagrams. Each binary liquid system exhibits the characteristics of classic cosolvency and the maximum molecular weight of polymer that may be dissolved is ca. 10 6 gmol −1 in combinations of acetone and tridecane. The shapes of the phase contour diagrams can be related to the solvent behaviour of the n-alkane used towards polystyrene, although cosolvent action is not a simple linear function of the mixture composition.
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