Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Polyolefin composites with curaua fibres: Effect of the processing conditions on mechanical properties, morphology and fibres dimensions

Full text
Author(s):
Mano, B. [1] ; Araujo, J. R. [1] ; Spinace, M. A. S. [1] ; De Paoli, M. -A. [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: COMPOSITES SCIENCE AND TECHNOLOGY; v. 70, n. 1, p. 29-35, JAN 2010.
Web of Science Citations: 46
Abstract

Composites of polypropylene (PP) and high density polyethylene (HDPE) reinforced with 20 wt.% of curaua fibres were prepared using a twin-screw extruder and the effect of screw rotation speed (SRS) was evaluated by measuring the output, the mechanical properties of the composites, the morphology and the fibre dimensions. Increase in SRS causes a decrease in length, diameter and aspect ratio of the fibres in both composites, due to the high shear forces acting in the molten polymer and transferred to the fibres. Consequently, the reinforcement effect of the fibres decreased, as evidenced by the flexural and tensile mechanical properties of the composites. Additionally, polymeric matrices undergoes thermo-mechanical degradation during processing, this also contributed to the changes in the mechanical properties. Comparison between the matrices showed that PP composites are less affected by changes in SRS, suffering fewer changes in fibre dimensional parameters and in the mechanical properties than HDPE composites. (C) 2009 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 04/15084-6 - Polymeric materials of low environmental impact
Grantee:Marco-Aurelio de Paoli
Support Opportunities: Research Projects - Thematic Grants