INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Dynamic-mechanical properties of syntactic foams based on epoxidized soybean oil-epoxy copolymers
Autor/es:
F.I. ALTUNA; R.A. RUSECKAITE; P.M. STEFANI; L. ESPÓSITO; I. MONDRAGÓN
Lugar:
Donostia - San Sebastián, España
Reunión:
Conferencia; V International Conference on Science and Technology of Composite Materials; 2009
Institución organizadora:
AEMAC (Asociación Española de Materiales Compuestos) en colaboración con la Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU)
Resumen:
Bio-based syntactic foams were produced by partial substitution of diglycidyl ether of bisphenol A (DGEBA) with epoxidized soybean oil (ESO). Dynamic-mechanical properties of the matrices with different ESO content were evaluated. The glass transition temperature (Tg) values of the matrix were shifted to lower temperatures with increasing ESO content, indicating an increased chain mobility of the matrix due to the contribution of the more flexible long-chain aliphatic fatty acids present in ESO structure. Syntactic foams were prepared by the vacuum – assisted mixing method and the volume fraction of glass microbaloons was 0.55 for all formulations. The Tg values of the syntactic foams did not show significant differences with those of parent matrix. The values of the storage modulus of the foams in the glassy state were lower than those of the corresponding copolymers due to lower density of the foams. In the rubbery state, the moduli of the foams were about one order of magnitude higher than those of the matrices, mainly due to the presence of rigid glass microbaloons in the foams. Results reported herein suggest that large fractions of DGEBA can be replaced by ESO with minor effect on their properties.