INTEMA 05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Monitoring of Visible Light Photopolymerization of an Epoxy/Dimethacrylate Hybrid System by Raman and Near-infrared Spectroscopies
Autor/es:
S. V. ASMUSSEN; W. F. SCHROEDER; I. E. DELL'ERBA; C. I. VALLO
Revista:
POLYMER TESTING
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 32 p. 1283 - 1289
ISSN:
0142-9418
Resumen:
Hybrid systems formulated with epoxy and methacrylate monomers at mass fraction either 50:50 or 75:25 were studied. The individual monomer conversions during photopolymerization with visible light were monitored by Raman and near-infrared spectroscopies. The rate of polymerization and final degree of conversion of the methacrylate groups were raised when the epoxy monomer was present. This is attributed to enhancement of the mobility of the reactive species caused by the presence of the epoxy monomer. Conversely, the earlier vitrification of the system due to the faster polymerizing methacrylate network resulted in reduced conversion of epoxy rings.
