INVESTIGADORES
GALANTE Maria Jose
artículos
Título:
Morphology Control in Polysulfone Modified Epoxy Resins by Demixing Behaviour
Autor/es:
M.I. GIANNOTTI; M.S. SOLSONA; M.J .GALANTE; P.A. OYANGUREN
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2002 vol. 89 p. 405 - 412
ISSN:
0021-8995
Resumen:
ABSTRACT: Polysulfone (PSu) was used as a modifier of
epoxy/aromatic diamine formulations. Two epoxy monomers,
based on diglycidyl ether of bisphenol A (DGEBA),
were used. The cure agent was 4,4-diaminodiphenylsulfone.
PSu was miscible with DGEBA, as shown by the existence
of a single glass-transition temperature within the
whole composition range. The effect of PSu addition on the
cure kinetics was investigated. The reaction rate of the epoxy?
amine species was slightly lower in the presence of PSu.
The morphology was analyzed by optical and scanning electron
microscopy. A range of microstructures were obtained
by control over the cure temperature, the amount of PSu
incorporated, and the molecular weights of the epoxy resins.
The variations in the morphology resulted from the different
stages of demixing, which were arrested because of the
different developments of the viscosity of the system.