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|Título:||Photochemical cross-linking study of polymers containing diacetylene groups in their main chain and azobenzene compounds as pendant groups|
|Palabras clave:||Física, Astronomía y Matemáticas|
|Editorial:||Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C.|
|Descripción:||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|
|Aparece en las Colecciones:||Superficies y vacío|
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