| Revista: | Superficies y vacío |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000396177 |
| ISSN: | 1665-3521 |
| Autors: | Vigueras Santiago, E1 Hernández López, S1 Rodríguez Romero, A1 |
| Institucions: | 1Universidad Autónoma del Estado de México, Facultad de Química, Toluca, Estado de México. México |
| Any: | 2006 |
| Període: | Mar |
| Volum: | 19 |
| Número: | 1 |
| Paginació: | 1-7 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | Photochemical cross-linking studies at different temperatures (room temperature, Tg and maximum exothermal of crosslinking peak) are shown for three series of polymers containing diacetylene-groups in the main chain and polar chromophores derived from benzene, azo- and di-azobenzene, as pendant groups. We establish the optimal irradiation time and temperature that permit them being poled and cross-linked with minimal dye-degradation. The degradation process was followed by a diminution of the respective maximum absorption peak. These conditions could extend the mean life-time of the second order nonlinear optical properties, studied previously. Photochemical cross-linking at each polymer´s Tg (50-130°C) was the most convenient process. It took less than 10 min and was monitored by IR spectroscopy |
| Disciplines | Química |
| Paraules clau: | Fisicoquímica y química teórica, Química de polímeros, Fotodegradación, Radiación ultravioleta, Polímeros, Reticulación, Diacetileno |
| Keyword: | Chemistry, Physical and theoretical chemistry, Polymer chemistry, Photodegradation, Ultraviolet radiation, Polymers, Cross-linking, Diacetylene |
| Text complet: | Texto completo (Ver PDF) |
