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The volume-temperature (V-T) relationship of polystyrene, poly(vinyl methyl ether) and their polymer blends in glassy and liquid states was measured at one atmospheric pressure from -25°C to 145°C. The expansion coefficient and volume change due to mixing in a liquid state were evaluated from the V-T relationship obtained experimentally. Using the equation of state derived by Sanchez and Lacombe and the above state parameters, the equation-of-state and molecular parameters of each homopolymer and polymer blend were estimated below phase transition temperature and the theoretical volume change due to mixing and heat of mixing were calculated. The experimental volume change due to mixing agreed roughly with the calculated value. The negative volume change due to mixing and heat of mixing calculated above indicated thermodynamic miscibility over the whole composition range. This polymer blend system was confirmed by measurement of the V-T relationship to be miscible in a thermodynamic sense

Посилання на статтю:

Miscibility estimated by the volume change due to mixing of a polystyrene/poly(vinyl methyl ether) blend system / Y. Tsujita*, M. Kato, T. Kinoshita and A. Takizawa // Polymer. – 1992. – Vol 33. – P. 773-777.

Miscibility estimated by the volume change due to mixing of a polystyrene/poly(vinyl methyl ether) blend system - Завантажити.