| Revista: | Brazilian journal of chemical engineering |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000308778 |
| ISSN: | 0104-6632 |
| Autores: | Reis, R.A1 Vladimir Oliveira, J2 Nobrega, R |
| Instituciones: | 1Universidade Federal do Rio de Janeiro, Instituto Alberto Luiz Coimbra de Pos-Graduacao e Pesquisa de Engenharia, Rio de Janeiro. Brasil 2Universidade Regional Integrada do Alto Uruguai e das Missoes, Departamento de Engenharia de Alimentos, Erechim, Rio Grande do Sul. Brasil |
| Año: | 2001 |
| Periodo: | Dic |
| Volumen: | 18 |
| Número: | 4 |
| Paginación: | 367-384 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | The Vrentas/Duda proposal for the diffusion of polymer-solvent systems, which is based on the free-volume theory, was employed in correlating and predicting mutual diffusion coefficients in highly concentrated polymer solutions. It has been observed that the predictive version of the model is capable of qualitatively representing the experimental data, while the use of an adjustable parameter greatly improves the performance of the model. The systems studied were poly(vinyl) acetate-toluene and Neoprene-acetone, and a comparison between experimental data and calculated values from the Vrentas/Duda model is reported. A new experimental apparatus based on the sorption technique was built to provide reliable diffusivity data on the Neoprene-acetone system |
| Disciplinas: | Química |
| Palabras clave: | Química de polímeros, Modelo de Vrentas-Duda, Teoría de volumen libre, Coeficiente de difusión, Sistemas polímero-solvente |
| Keyword: | Chemistry, Polymer chemistry, Vrentas-Duda model, Free-volume theory, Diffusion coefficient, Polymer-solvent systems |
| Texto completo: | Texto completo (Ver HTML) |
