Ítem


Analysis of the tensile modulus of polypropylene composites reinforced with stone groundwood fibers

One of the most relevant properties of composite materials to be considered is stiffness. Fiberglass has been used traditionally as a fibrous reinforcing element when stiff materials are required. However, natural fibers are been exploited as replacements for synthetic fibers to satisfy environmental concerns. Among the different natural fibers, wood fibers show the combination of relatively high aspect ratio, good specific stiffness and strength, low density, low cost, and less variability than other natural fibers of such those from annual crops. In this work, composites from polypropylene and stone groundwood fibers from softwood were prepared and mechanically characterized under tensile loads. The Young’s moduli of the ensuing composites were analyzed and their micromechanics aspects evaluated. The reinforcing effect of stone groundwood fibers was compared to that of conventional reinforcement such fiberglass. The Halpin-Tsai model with the modification proposed by Tsai-Pagano accounted fairly for the behavior of PP composites reinforced with stone groundwood fibers. It was also demonstrated that the aspect ratio of the reinforcement plays a role in the Young’s modulus of injection molded specimens

© BioResources, 2012, vol. 7, núm. 1, p. 1310-1323

North Carolina State University

Autor: López, Joan Pere
Mutjé Pujol, Pere
Pèlach Serra, Maria Àngels
El Mansouri, Nour-Eddine
Boufi, Sami
Vilaseca Morera, Fabiola
Data: 2012
Resum: One of the most relevant properties of composite materials to be considered is stiffness. Fiberglass has been used traditionally as a fibrous reinforcing element when stiff materials are required. However, natural fibers are been exploited as replacements for synthetic fibers to satisfy environmental concerns. Among the different natural fibers, wood fibers show the combination of relatively high aspect ratio, good specific stiffness and strength, low density, low cost, and less variability than other natural fibers of such those from annual crops. In this work, composites from polypropylene and stone groundwood fibers from softwood were prepared and mechanically characterized under tensile loads. The Young’s moduli of the ensuing composites were analyzed and their micromechanics aspects evaluated. The reinforcing effect of stone groundwood fibers was compared to that of conventional reinforcement such fiberglass. The Halpin-Tsai model with the modification proposed by Tsai-Pagano accounted fairly for the behavior of PP composites reinforced with stone groundwood fibers. It was also demonstrated that the aspect ratio of the reinforcement plays a role in the Young’s modulus of injection molded specimens
Format: application/pdf
ISSN: 1930-2126
Accés al document: http://hdl.handle.net/10256/7588
Llenguatge: eng
Editor: North Carolina State University
Col·lecció: Articles publicats (D-EQATA)
És part de: © BioResources, 2012, vol. 7, núm. 1, p. 1310-1323
Drets: Tots els drets reservats
Matèria: Polipropilè
Polypropylene
Materials compostos -- Propietats mecàniques
Composite materials -- Mechanical properties
Fibres naturals
Natural fibers
Títol: Analysis of the tensile modulus of polypropylene composites reinforced with stone groundwood fibers
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

Matèries

Autors