Abstract
The use of Flory-Huggins interaction parameters to express the solvent effect on the equilibrium polymerizations is reviewed. Interactions in three binary mixtures: 1,3-dioxolan/benzene, benzene/poly(1,3-dioxolan), and 1,3-dioxolan/poly(1,3-dioxolan) have been investigated at various temperatures using vapor pressure measurements. Calculations yield a parameter of about 0.17 for the first mixture, 0.25 for the second and 0.65 for the last one. The magnitudes of the two first parameters indicate that monomer/solvent interactions are relatively weak while solvent/polymer interactions are rather strong so that, on the thermodynamic point of view, benzene should be regarded as a good solvent for the polymerization of 1,3-dioxolan. All those parameters were then used together with the available data of equilibrium compositions of polymerization of 1,3-dioxolan to compute the solvent effect as well as the free-energy change for this reaction.
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Bui, V., Léonard, J. Survey of the Solvent Effect on Equilibrium Polymerization: The Case of 1,3-Dioxolan. Polym J 21, 185–191 (1989). https://doi.org/10.1295/polymj.21.185
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DOI: https://doi.org/10.1295/polymj.21.185