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The Flory–Huggins interaction parameter χ(r i ) is considered as dependent on the chain length of a polymer. Therefore, a modified free energy expression of Flory–Huggins theory is obtained for the polydisperse polymer solutions. Based on this modified free energy expression and the thermodynamics of Gibbs, the expression of spinodal for polydisperse polymer solutions is obtained. For a given...
The cloud-point temperatures (T cl 's) of trans-decahydronaphthalene (TD)/polystyrene (PS, M w =270 kg/mol) solutions were determined by light scattering measurements over a range of temperatures (1-16 o C), pressures (100-900 bar), and compositions (4.2-21.6 vol% polymer). The system phase separates upon cooling and the T cl was found to increase with the...
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