Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1
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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.
How to cite this document
Dall'Agnol, Fernando et al. Temperature dependence of photoinduced birefringence in polystyrene doped with Disperse Red-1. Macromolecular Rapid Communications, v. 23, n. 16, p. 948-951, 2002. Available at: <http://hdl.handle.net/11449/231708>.