INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
Tensile and fracture behaviour of PP/wood flour composites
Autor/es:
E. PÉREZ; L. FAMÁ ; SANTIAGO GARCÍA P,; MARÍA J. ABAD; CELINA BERNAL
Revista:
COMPOSITES PART B-ENGINEERING
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2012 p. 2795 - 2800
ISSN:
1359-8368
Resumen:
Polypropylene/wood flour composites were prepared by intensive mixing and subsequent compression moulding. The effect of fibre content and the incorporation of maleic anhydride grafted polypropylene (MAPP) on the materials tensile and fracture behaviour was investigated. The failure mechanisms occurring in these composites were also identified. In unmodified composites an increase in Young´s modulus was obtained with the addition of wood flour to PP, whereas tensile strength, strain at break and fracture toughness were found to decrease as fibre content increased. The presence of MAPP was slightly detrimental to the material stiffness but beneficial to tensile strength and ductility and had no significant effect on fracture toughness. This was attributed to the enhanced fibre dispersion and the improved interfacial adhesion promoted by the coupling agent. Although reduced ductility and toughness were observed for the composites respect to the matrix, in the case of modified composites, environmentally friendly materials were obtained with a reduction in the amount of non-biodegradable material and also with cost saving and increased stiffness without sacrificing strength.