| Revista: | Polimeros (Sao Carlos) |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000314023 |
| ISSN: | 1678-5169 |
| Autores: | Kawano, Yoshio1 Wang, Yanqia2 Palmer, Richard A Aubuchon, Steve R |
| Instituciones: | 1Universidade de Sao Paulo, Instituto de Quimica, Sao Paulo. Brasil 2Duke University, Department of Chemistry, Durham, Carolina del Norte. Estados Unidos de América |
| Año: | 2002 |
| Volumen: | 12 |
| Número: | 2 |
| Paginación: | 96-101 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | Nafion membranes have been studied using dynamic mechanical analysis in the controlled force mode and clamp of tension film measurements for as received commercial Nafion membranes with different solvent contents and with different cations (Li+, Na+, K+, Rb+ and Cs+). In comparison with as-received Nafion membranes, the initial slope of the stress-strain curves decreases with increasing water contents in the Nafion membrane and also with the addition of methanol, ethanol and ethanol/water (50/50%, v/v) mixture. The initial slope decreases also with increasing temperatures. On the other hand, the initial slope increases when the cation is replaced, in the following order: Li+, Na+, K+, Cs+ and Rb+. Nafion in salt form normally shows an increase in the initial slope from room temperature up to approximately 90ºC, after which the slope decreases with increasing temperatures |
| Disciplinas: | Química |
| Palabras clave: | Química de polímeros, Nafion, Tensión, Deformación, DMA |
| Keyword: | Chemistry, Polymer chemistry, Nafion, Stress, DMA, Strain |
| Texto completo: | Texto completo (Ver HTML) |
