Photochemical cross-linking study of polymers containing diacetylene groups in their main chain and azobenzene compounds as pendant groups
Título del documento: Photochemical cross-linking study of polymers containing diacetylene groups in their main chain and azobenzene compounds as pendant groups
Revista: Superficies y vacío
Base de datos: PERIÓDICA
Número de sistema: 000396177
ISSN: 1665-3521
Autores: 1
1
1
Instituciones: 1Universidad Autónoma del Estado de México, Facultad de Química, Toluca, Estado de México. México
Año:
Periodo: Mar
Volumen: 19
Número: 1
Paginación: 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
Disciplinas: Química
Palabras clave: 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
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