INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Photosensitization of water-soluble polystyrene copolymers of vinylbenzylthymine and vinylphenylsulfonate
Autor/es:
V. NOWAKOWSKI; R. W. GURNEY; D.M. MARTINO
Lugar:
Philadelphia
Reunión:
Conferencia; 244th ACS Conference National Meeting & Exposition; 2012
Institución organizadora:
ACS
Resumen:
Thymine-based polymers are especially interesting due to the photoinitiated cross-linking functionality of thymine that increases the polymers’ strength and adhesion to surfaces.   It is of great importance to determine whether sensitizer molecules promote photocrosslinking/immobilization of the thymine-based, water-soluble, polystyrene copolymers using low-energy irradiation (500 nm) as compared to the UV irradiation (280 nm) necessary for the standard photoinduced process to take place.   Using a sensitizer, vinylbenzylthymine−vinylphenylsulfonate (VBT-VPS) copolymers were immobilized on polyethylterephthalate (PET) after exposure to visible irradiation. By exciting the sensitizer molecules in the presence of VBT copolymers at a wavelength where absorption by the latter does not occur, the triplet state of the sensitizer will be generated in high yields, and consequently, polymer photocross-linking takes place. UV−vis spectroscopy will be used to study the effect of irradiation dose, copolymer composition, and sensitizer concentration on the photoreactivity of VBT polymers.