Effect of extrusion screw speed on biocomposite thermo-mechanical properties

Article

Chevali, Venkata S. and Ulven, Chad A.. 2012. "Effect of extrusion screw speed on biocomposite thermo-mechanical properties." International Journal of Sustainable Engineering. 5 (1), pp. 38-46. https://doi.org/10.1080/19397038.2010.547625
Article Title

Effect of extrusion screw speed on biocomposite thermo-mechanical properties

ERA Journal ID124408
Article CategoryArticle
AuthorsChevali, Venkata S. (Author) and Ulven, Chad A. (Author)
Journal TitleInternational Journal of Sustainable Engineering
Journal Citation5 (1), pp. 38-46
Number of Pages9
Year2012
Place of PublicationUnited Kingdom
ISSN1939-7038
1939-7046
Digital Object Identifier (DOI)https://doi.org/10.1080/19397038.2010.547625
Web Address (URL)http://www.tandfonline.com/doi/abs/10.1080/19397038.2010.547625
Abstract

Thermo-mechanical, optical and physical properties of polypropylene (PP)/lignocellulosic fibre-filled/maleated PP composites were studied as a function of extrusion screw speeds. All materials were extruded at four screw speeds and injection moulded as dogbone specimens. The density, yellowness index (YI) and Fourier-transform infrared spectra were determined for the processed specimens. Tensile properties and coefficient of linear thermal expansion (CLTE) were also determined. The densities of the composites remained constant within the same composition. YI and absorbances of carbonyl, vinylidene and hydroxyl groups, which are indicators of thermo-oxidation, decreased with a shorter extruder residence time. The CLTE and tensile properties showed peak properties at intermediate screw speeds. The analysis suggested optimising the residence time assisting in achieving a balance of properties.

Keywordsbiocomposites; extrusion; thermal degradation; infrared spectroscopy; tensile properties; yellowness index
ANZSRC Field of Research 2020340399. Macromolecular and materials chemistry not elsewhere classified
401602. Composite and hybrid materials
401609. Polymers and plastics
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Byline AffiliationsNorth Dakota State University, United States
Institution of OriginUniversity of Southern Queensland
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