INVESTIGADORES
BERNAL Celina Raquel
artículos
Título:
Morphology and Fracture Properties Relationship of Epoxy-Diamine Systems Simultaneously Modified With Polysulfone and Poly(ether imide)
Autor/es:
M.I. GIANNOTTI, C.R. BERNAL, P.A. OYANGUREN, M.J. GALANTE
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
Society of Plastics Engineers
Referencias:
Año: 2005 vol. 45 p. 1312 - 1318
ISSN:
0032-3888
Resumen:
An epoxy-diamine system was simultaneously modi-
fied with two immiscible thermoplastic polymers,
polysulfone (PSF) and poly (ether imide) (PEI), to develop
tough materials without adding high quantities
of modifiers, in order to avoid the processibility problems
caused by the high initial viscosity of the mixtures.
The mechanical behavior of blends containing
10 and 15 wt% total thermoplastic was analyzed and
compared with the generated morphologies. The
scanning electron micrographs (SEM) of the broken
surfaces showed that when a small part of PEI is
replaced by PSF, drastic changes in morphology, leading
to co-continuity between the phases, occurred
together with fracture (critical stress intensity factor,
KIC) improvements. As an additional advantage, no
noticeable decrease in the elastic modulus (E) of final
materials was observed.IC) improvements. As an additional advantage, no
noticeable decrease in the elastic modulus (E) of final
materials was observed.