info:eu-repo/semantics/article
Polypropylene-natural fibre composites. Analysis of fibre structure modification during compounding and its influence on the final properties
Registro en:
Puglia, Debora; Terenzi, Andrea; Barbosa, Silvia Elena; Kenny, José M.; Polypropylene-natural fibre composites. Analysis of fibre structure modification during compounding and its influence on the final properties; Vsp Bv; Composite Interfaces; 15; 2-3; 3-2008; 111-129
0927-6440
CONICET Digital
CONICET
Autor
Puglia, Debora
Terenzi, Andrea
Barbosa, Silvia Elena
Kenny, José M.
Resumen
The final properties of composite materials are highly dependent on the residual geometrical parameters (length, diameter, aspect ratio), orientation and distribution of the fibres in the matrix, which in turn are related to the processing conditions. This study analysed the fibre structure variation during the processing of a polypropylene matrix reinforced with cellulose flax pulp for different reinforcement concentrations. The fibre's geometrical parameters, length, diameter and aspect ratio have been measured and their statistical distributions have been assessed for each concentration. Furthermore, the effect of the microstructure variation on the final mechanical properties was analysed. In particular, changes in the interfacial area were evaluated based on the hypothesis that the fibres were cylindrical in shape and considering the average values of the diameters and the lengths calculated using a statistical distribution approach. The fibre interfacial area after the process decreases as the fibre concentration increases and this evaluation explains how the adhesion methods that are used for fibre surface modification fail because of the decrement in the modifier interfacial density. The Halpin-Tsai approach was used to model the experimental data obtained from tensile tests for different composites, so as to confirm the effect of fibre parameters, such as aspect ratio and interfacial area values, in the PP/cellulose blends final properties. © 2008 VSP. Fil: Puglia, Debora. Università di Perugia; Italia Fil: Terenzi, Andrea. Università di Perugia; Italia Fil: Barbosa, Silvia Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Kenny, José M.. Università di Perugia; Italia