Phase behavior of polystyrene-polyisoprene-toluene systems in the temperature range 15-45°c

The phase behavior of narrow molecular weight distribution samples of polystyrene and polyisoprene in the presence of toluene was investigated by means of gel permeation chromatography. Equilibrium phase diagrams, tie lines, and critical points for a number of partially miscible polystyrene‐polyisop...

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Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1991-02, Vol.29 (2), p.161-170
Main Authors: Tseng, Hsiao-show, Lloyd, Douglas R., Ward, Thomas C.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Summary:The phase behavior of narrow molecular weight distribution samples of polystyrene and polyisoprene in the presence of toluene was investigated by means of gel permeation chromatography. Equilibrium phase diagrams, tie lines, and critical points for a number of partially miscible polystyrene‐polyisoprene‐toluene systems were generated at 15 and 30°C and 1 atm pressure. The data were combined with previously reported results at 45°C. Using the experimentally determined phase compositions along with literature values of the polymer–solvent interaction parameters, the polymer–polymer interaction parameters were evaluated using the Flory–Huggins theory. The influence of temperature, polymer molecular weight, and polymer–solvant interaction parameters on the size, shape, and location of the equilibrium phase curve, the location of the critical point, and the polymer–polymer interaction parameter was studied.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1991.090290203