Producción CyT
Artículo
Autoría
DELL'ERBA, IGNACIO ESTEBAN
;
ARENAS, GUSTAVO FRANCISCO
;
SCHROEDER, WALTER FABIAN
;
Asmussen, Silvana Valeria
;
Vallo, Claudia Ines
Fecha
2014
Editorial y Lugar de Edición
Elsevier Science Sa
Revista
PROGRESS IN ORGANIC COATINGS,
vol. 77
(pp. 1848-1853)
Elsevier Science Sa
Resumen
Información suministrada por el agente en
SIGEVA
Hybrid organic–inorganic macrophotoinitiator bearing pendant tertiary amine groups (OI-AH) was prepared by hydrolytic condensation of a silane containing amino groups. The macromolecular amino-functionalized photoinitiator was used in combination with camphorquinone (CQ) for visible-light photo-polymerization. The OI-AH was incorporated into methacrylate resins at loadings between 1 and 10 wt.%. The photodecomposition of the CQ/OI-AH in methacrylate monomers under visible light irradiatio...
Hybrid organic–inorganic macrophotoinitiator bearing pendant tertiary amine groups (OI-AH) was prepared by hydrolytic condensation of a silane containing amino groups. The macromolecular amino-functionalized photoinitiator was used in combination with camphorquinone (CQ) for visible-light photo-polymerization. The OI-AH was incorporated into methacrylate resins at loadings between 1 and 10 wt.%. The photodecomposition of the CQ/OI-AH in methacrylate monomers under visible light irradiation (? = 470 nm) was examined. The photolysis products of CQ/OI-AH were transparent at the irradiating wavelengths; consequently, the consumption of the CQ is accompanied by increased light intensity in the underlying lays. The clean and rapid photobleaching of CQ in combination with OI-AH makes this photoinitiator system very attractive for polymerization of thick sections. The evolution of monomer conversion versus irradiation time showed that the OI-AH is an efficient co-initiator of CQ because a fast reaction and high conversion of methacrylate groups result after 60 s irradiation with a LED source of 140 mW.
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Palabras Clave
HYBRID ORGANIC-INORGANICMACROPHOTOINITIATORPHOTOPOLYMERIZATIONSOL-GEL
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