Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2013;2:2-9 DOI: 10.1016/j.jmrt.2013.03.006
Original Article
Processing and properties of continuous and aligned curaua fibers incorporated polyester composites
Sergio Neves Monteiroa,, , Felipe Perisse Duarte Lopesb, Denise Cristina Oliveira Nascimentob, Ailton da Silva Ferreirab, Kestur Gundappa Satyanarayanac
a Materials Science Department, Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ, Brazil
b Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Advanced Materials Laboratory (LAMAV), Campos dos Goytacazes, RJ, Brazil
c Acharya Institutes, BMS College of Engineering & Poornapragna Institute of Scientific Research, Bangalore, India
Received 24 August 2012, Accepted 28 August 2012
Abstract

This paper presents systematic studies carried out on the processing and characterization of continuous and aligned curaua fibers-polyester composites. Laminates of these composites with (0 to 40 vol. %) curaua fibers were press-molded at room temperature, cured for 24hours and tested for strength properties. Resulting fracture surfaces were analyzed by scanning electron microscope. Composites showed high flexural properties, which is attributed to a complex mechanism of individual interaction of the microfibrils with the matrix during crack initiation and further propagation through a model of stress concentration due to the specific fiber/matrix interface geometry. Impact test results showed a remarkable increase in the notch toughness with the amount of incorporated curaua fibers, which is attributed to the difficulty of breaking down the fibers and preferential de-bonding of the fiber/matrix interface, which in turn contributes to an elevated absorbed energy.

Keywords
Curaua fiber, Polyester composites, Fiber/matrix bond, Mechanical properties, Failure criterion
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Corresponding author. (Sergio Neves Monteiro sergio.neves@ig.com.br)
Copyright © 2013. Brazilian Metallurgical, Materials and Mining Association
J Mater Res Technol 2013;2:2-9 DOI: 10.1016/j.jmrt.2013.03.006