Abstract
The phase behavior of syndiotactic polystyrene in solvents with different qualities has been investigated. The concentration dependence of the melting points of the β- and δ-phases has been measured, and the experimental data have been used to construct the corresponding liquidi. The different solvents can therefore be classified in order of increasing solvent quality for polystyrene: decalin< 1,2,4-trichlorobenzene< o-xylene< 1,2-dichlorobenzene< chlorobenzene< chloroform. The stability of the β-phase increases with decreasing solvent quality. The opposite influence of this solvent quality is observed for the δ-phase
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