Summary
Swelling of polystyrene networks has been studied within the range from 288 to 323 K. Results are discussed following FLORY-HUGGINS and FLORY-REHNER approaches. Thermodynamic analyses with respect to the enthalpy and to the entropy part of the chemical potential of the solvent have been carried out. The volume fraction dependence of the thermodynamic properties derived could be cancelled applying the two-parameter KONINGSVELD-KLEINTJENS equation for polymer solutions to swollen gels. Thus, an unequivocal interpretation of swelling thermodynamics could be reached, irrespective crosslink density of the networks.
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Cantow, H.J., Schuster, R.H. Thermodynamics of macromolecular systems. Polymer Bulletin 8, 225–231 (1982). https://doi.org/10.1007/BF00700282
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DOI: https://doi.org/10.1007/BF00700282