Publicação: Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
Nenhuma Miniatura disponível
Data
2002-11-25
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
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 in photoisomerization.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Macromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002.
