Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
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Data
2002-11-25
Autores
Dall'Agnol, F.
Silva, JR
Zilio, S. C.
Oliveira, O. N.
Giacometti, J. A.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
A theoretical model on the basis of the free-volume concept is presented explaining the temperature dependence of photoinduced birefringence in polystyrene films that contain Disperse Red-1. Birefringence increases with temperature up to 180 K as the free volume for isomerization increases, and then decreases as thermally activated processes dominate. The fast process of birefringence decay has a time constant that increases with temperature at low temperatures, due to the change kin photoisomerization.
Descrição
Palavras-chave
Disperse Red-1, free volume, isomer/isomerization, photoinduced birefringence, polystyrene
Como citar
Macromolecular Rapid Communications. Weinheim: Wiley-v C H Verlag Gmbh, v. 23, n. 16, p. 948-951, 2002.