Photochemical cross-linking study of polymers containing diacetylene groups in their main chain and azobenzene compounds as pendant groups
Document title: Photochemical cross-linking study of polymers containing diacetylene groups in their main chain and azobenzene compounds as pendant groups
Journal: Superficies y vacío
Database: PERIÓDICA
System number: 000396177
ISSN: 1665-3521
Authors: 1
1
1
Institutions: 1Universidad Autónoma del Estado de México, Facultad de Química, Toluca, Estado de México. México
Year:
Season: Mar
Volumen: 19
Number: 1
Pages: 1-7
Country: México
Language: Inglés
Document type: Artículo
Approach: Analítico
English abstract 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
Keyword: 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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