Abstract
AbstractThe thermodynamics of the binary system oligo(ethylene glycol) (OEG) ‐ oligo(propylene glycol) (OPG) is investigated by lightscattering. The Flory‐Huggins interaction parameter χ12 for this system is determined by the decrease of the OEG melting point in a mixture with OPG. At 310,8 K the system is compatible in the concentration range between 0 and 30 vol.‐% of OPG in the mixture. The analysis of the temperature dependence of χ12 according to the novel Flory theory leads to the assumption that mixing in this system occurs at a lower critical mixing temperature.
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