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Comparison of water absorption and mechanical properties of wood-plastic composites made from polypropylene and polylactic acid
Department of Mechanical Engineering, Lappeenranta University of Technology.ORCID iD: 0000-0002-7282-9841
Department of Mechanical Engineering, Lappeenranta University of Technology.
Department of Mechanical Engineering, Lappeenranta University of Technology.
2010 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 5, no 3-4, p. 220-228Article in journal (Refereed) Published
Abstract [en]

This study focuses on the water absorption and mechanical properties of composites made from softwood sawdust and plastics, such as virgin and recycled polypropylene and polylactic acid (PLA). The composites were processed by extrusion, and their properties were investigated by a water immersion test, mechanical tests and a cyclic test for moisture resistance. Scanning electron microscopy was used to study the morphology of the fracture surfaces of the composites. The composites made with recycled polypropylene had the lowest water absorption and thickness swelling of the studied composites. The PLA composites made with heat-treated sawdust showed the highest flexural strength. Of the polypropylene based composites, virgin polypropylene resulted in composites with higher flexural strength. The Charpy impact strength of the composites was found to have an inverse trend compared to flexural strength. Cyclic treatment of the studied composites resulted in 20-60% loss of flexural strength, depending on type of composite.

Place, publisher, year, edition, pages
Taylor & Francis, 2010. Vol. 5, no 3-4, p. 220-228
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-68604DOI: 10.1080/17480272.2010.532233OAI: oai:DiVA.org:ltu-68604DiVA, id: diva2:1203558
Available from: 2018-05-03 Created: 2018-05-03 Last updated: 2018-05-03Bibliographically approved

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