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.