Different parameters controlling the initial solubility of two thermoplastics in epoxy reactive solvents
The influence of different factors on the miscibility of diglycidyl ether of bisphenol A (DGEBA)/thermoplastic blends was studied. DGEBA/poly(ether imide) (PEI) blends exhibited upper critical solution temperature behavior. The addition of a trifunctional epoxy [triglycidyl para-amino phenol (TGpAP)...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2002 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/36893 |
| Acceso en línea: | http://hdl.handle.net/11336/36893 |
| Access Level: | acceso abierto |
| Palabra clave: | Flory-Huggins Equation Phase Diagrams Phase Separation Poly(Ether Imides) Poly(Ether Sulfones) Thermoplastic-Modified Epoxies https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | The influence of different factors on the miscibility of diglycidyl ether of bisphenol A (DGEBA)/thermoplastic blends was studied. DGEBA/poly(ether imide) (PEI) blends exhibited upper critical solution temperature behavior. The addition of a trifunctional epoxy [triglycidyl para-amino phenol (TGpAP)] increased the miscibility window. The addition of diamines as hardeners could also increase [4,4′-methylene-bis(3-chloro-2,6-diethylaniline) (MCDEA)] or decrease (4,4′-diaminodiphenylsulfone) the miscibility window. DGEBA/poly(ether sulfone) (PES) blends showed lower critical solution temperature behavior. The addition of TGpAP had an effect similar to that for PEI blends, but the presence of MCDEA as a hardener decreased the miscibility of epoxy/PES blends. The modeling of the cloud-point curves was performed with the Flory-Huggins equation (Flory, P. J. Principles of Polymer Chemistry; Cornell University Press: Ithaca, NY, 1953; p 672) according to the procedure developed by K. Kamide, S. Matsuada, and H. Shirataki (Eur Polym J 1990, 26, 379), with the interaction parameter used as the fitting parameter. A phenomenological model that takes into account the molar mass of DGEBA and the amount of TGpAP is proposed and is found to predict the cloud-point temperature of any TGpAP/DGEBA/PEI blend. |
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