A new modified Wilson equation for the calculation of vapor-liquid equilibrium of aqueous polymer solutions

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

Xu, X (Autor) Outra; Pedro P. Madeira (Autor) FEUP; Teixeira, JA (Autor) Outra; Maria Eugénia Macedo (Autor) FEUP

Revista

Título: Fluid Phase Equilibria

Vol. 213

Páginas: 53-63

ISSN: 0378-3812

Editora: Elsevier

Indexação

ISI Web of Knowledge - 30 Citações

ISI Web of Science

Scopus - 33 Citações

COMPENDEX

Outras Informações

ID Authenticus: P-000-ET3

DOI: 10.1016/s0378-3812(03)00185-7

Abstract (EN): A local composition model based on the lattice theory and two-fluid theory, considering the excess heat capacity, which is a modified Wilson equation, is developed for the excess Gibbs energy of aqueous polymer solutions. The model represents a synergistic combination of the excess entropy for mixing molecules of different sizes and the temperature dependent residual contribution, which combines the attractive interactions between solvent molecules and the segments with the contribution of the excess heat capacity. The results of the extrapolation with respect to molecular weight of phase equilibrium in aqueous polymer solutions with this model are very satisfactory, with only two adjustable parameters.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 11