'New tailor-made biopolymers produced from lignocellulosic sugars waste for highly demanding fire-resistant applications'

Materials prepared from biopolyethylene and curaua fibers: Composites from biomass

Publication date: October 2012
Source:Polymer Testing, Volume 31, Issue 7

Author(s): D.O. Castro , A. Ruvolo-Filho , E. Frollini

Composites of high-density biopolyethylene (HDBPE) obtained from ethylene derived from sugarcane ethanol and curaua fibers were formed by first mixing in an internal mixer followed by thermopressing. Additionally, hydroxyl-terminated polybutadiene (LHPB), which is usually used as an impact modifier, was mainly used in this study as a compatibilizer agent. The fibers, HDBPE and LHPB were also compounded using an inter-meshing twin-screw extruder and, subsequently, injection molded. The presence of the curaua fibers enhanced some of the properties of the HDBPE, such as its flexural strength and storage modulus. SEM images showed that the addition of LHPB improved the adhesion of the fiber/matrix at the interface, which increased the impact strength of the composite. The higher shear experienced during processing probably led to a more homogeneous distribution of fibers,Cartier Tank Replica Watches making the composite that was prepared through extruder/injection molding more resistant to impact than the composite processed by the internal mixer/thermopressing.

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This project has received funding from the European Unionís Seventh Framework Programme for research, technological development and demonstration