Producción CyT
Artículo
Autoría
DELL'ERBA, IGNACIO ESTEBAN
;
Asmussen, Silvana Valeria
;
SCHROEDER, WALTER FABIAN
;
Vallo, Claudia Ines
Fecha
2012
Editorial y Lugar de Edición
SPRINGER
Revista
JOURNAL OF MATERIALS SCIENCE,
vol. 47
(pp. 6665-6672)
- ISSN 0022-2461
SPRINGER
SPRINGER
ISSN
0022-2461
Resumen
Información suministrada por el agente en
SIGEVA
Polyhedral oligomeric silsesquioxanes (SSQO) functionalized with bulky amino groups were prepared by a two-stage synthesis procedure. In a first stage, a modified organotrimethoxysilane was synthesized by reacting 1 mol of N-(b-aminoethyl)-c-aminopropyltrimethoxysilane with 3 mol of 1,2-epoxy-3-phenoxypropane. The second stage consisted of the hydrolytic condensation of the modified silane catalyzed by formic acid. Methacrylate resins were activated for visible light polymerization by the addit...
Polyhedral oligomeric silsesquioxanes (SSQO) functionalized with bulky amino groups were prepared by a two-stage synthesis procedure. In a first stage, a modified organotrimethoxysilane was synthesized by reacting 1 mol of N-(b-aminoethyl)-c-aminopropyltrimethoxysilane with 3 mol of 1,2-epoxy-3-phenoxypropane. The second stage consisted of the hydrolytic condensation of the modified silane catalyzed by formic acid. Methacrylate resins were activated for visible light polymerization by the addition of camphorquinone (CQ) in combination with different mass fractions of SSQO. The progress of monomer conversion versus irradiation time showed that the CQ/SSQO pair is an efficient photoinitiator system because a fast reaction and high conversion results from 60 s irradiation at 600 mW/ cm2 . The SSQO were incorporated up to 22 wt% in the methacrylate resin without compromising the flexural or the compressive properties of the final material.
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Palabras Clave
SILSESQUIOXANESPHOTOPOLYMERIZATIONNANOCOMPOSITESMETHACRYLATES
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