Artículo
Reaction-induced phase separation in an epoxy/low molecular weight solvent system
Soulé, Ezequiel Rodolfo
; García de la Mata, Manuel; Borrajo Fernandez, Julio
; Oyanguren, Patricia Angelica
; Galante, Maria Jose
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
07/2003
Editorial:
Springer
Revista:
Journal of Materials Science
ISSN:
0022-2461
e-ISSN:
1573-4803
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Blends based on a stoichiometric mixture of diglycidyl ether of bisphenol A (DGEBA) and 2,2′-bis(4-amino-cyclohexyl)methane (ACHM) and cyclohexane as low molecular weight solvent were studied. The polymerization kinetics data experimentally obtained at different temperatures (30-60°C) were accurate fitted using a mechanistic model. The effect of the solvent over the polymerization rate was analyzed. No influence of the presence of the solvent was found up to 20 wt% of cyclohexane in the sample. The thermodynamic analysis using Flory-Huggins model allowed determination of the initial miscibility of binary blends containing DGEBA/cyclohexane and pseudo-binary mixtures of DGEBA/ACHM/cyclohexane. The presence of ACHM increases the DGEBA/cyclohexane initial solubility. The reaction-induced phase separation was described using a conversion-composition transformation phase diagram. It indicates that phase separation takes place by a nucleation and growth (NG) mechanism. The appropriate selection of composition of the blend and polymerization conditions led to final materials with a desired closed cell porous morphology.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Soulé, Ezequiel Rodolfo; García de la Mata, Manuel; Borrajo Fernandez, Julio; Oyanguren, Patricia Angelica; Galante, Maria Jose; Reaction-induced phase separation in an epoxy/low molecular weight solvent system; Springer; Journal of Materials Science; 38; 13; 7-2003; 2809-2814
Compartir
Altmétricas