INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Fracture behaviour of PP based composites reinforced with micro and nano-sized fillers
Autor/es:
C. BERNAL; C.J. PÉREZ; V. ALVAREZ; L. FAMÁ; E. PÉREZ
Lugar:
Budapest
Reunión:
Congreso; 14th European Conference on Composite Materials; 2010
Resumen:
A widely-used practice in industry to obtain materials with improved properties at relatively low cost is the incorporation of both micro- and nano-sized fillers into polymers. In the present work, polypropylene (PP) and 5 wt % of different nano and micro-sized fillers (organo-modified clay, SiO2 nanoparticles, Al2O3 nanoparticles or CaCO3 particles) were mixed in an intensive mixer. Composites with different CaCO3 content were also prepared and the effect of the incorporation of PP-g-MA in the composites formulation was also analysed. Fracture tests on double-edge-notched tensile specimens (DENT) were carried out for the PP matrix, the blend of PP and PP-g-MA and the different composites with and without PP-g-MA. All materials exhibited quasibrittle fracture response therefore, the J-Integral parameter at instability (Jc) was adopted to characterise the materials fracture behaviour. It was found that the incorporation of CaCO3 to PP in the composites with PP-g-MA led to materials with lower fracture toughness values than those of pure PP. The composite with 5 wt % CaCO3 without PP-g-MA exhibited significantly improved fracture properties in agreement with previous findings of tensile toughness results. Currently, the fracture behaviour of the composites with different fillers with and without PP-g-MA is being studied.