| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000403108 |
| ISSN: | 0103-9733 |
| Autors: | Puech, Nicolas1 Mora, Serge1 Porte, Gregoire1 Phou, Ty1 Grillo, Isabelle2 Oberdisse, Julian1 |
| Institucions: | 1Universite de Montpellier II (Sciences et Techniques), Laboratoire des Colloides, Verres et Nanomateriaux, Montpellier, Herault. Francia 2Institut Laue-Langevin, Grenoble, Isere. Francia |
| Any: | 2009 |
| Període: | Abr |
| Volum: | 39 |
| Número: | 1A |
| Paginació: | 198-204 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | Model self-assembled networks of telechelic polymer C18 − PEO(35k) −C18 in water have been studied. The rheology of such transient networks has been investigated as a function of polymer concentration, and a typical percolation law has been observed. The network structure has been characterised by Small Angle Neutron Scattering in D2O, where the interactions between micelles formed by the hydrophobic C18-stickers of the polymer give rise to a peak in the scattered intensity. These model networks have then been used as a matrix for the incorporation of silica nanoparticles (R = 10 nm), and we have checked individual dispersion by scattering using contrast variation. The rheological response of the networks is considerably modified by the presence of the silica nanoparticles, and in particular an interesting dependence of the relaxation time on silica concentration has been found. The analogy in reinforcement behaviour of such a self-assembled, viscoelastic, and aqueous system with model experiments of elastomers filled with nanoparticles is discussed by comparison to a silica-latex system |
| Disciplines | Física y astronomía, Química |
| Paraules clau: | Mecánica, elasticidad y reología, Fisicoquímica y química teórica, Nanocompuestos, Polímeros, Nanopartículas, Elastómeros |
| Keyword: | Physics and astronomy, Chemistry, Mechanics, elasticity and rheology, Physical and theoretical chemistry, Nanocomposites, Polymers, Nanoparticles, Elastomers |
| Text complet: | Texto completo (Ver PDF) |
