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Accelerated weathering of wood-polypropylene composites containing minerals
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.
2012 (engelsk)Inngår i: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 43, nr 11, s. 2087-2094Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Accelerated weathering tests were carried out on wood-polypropylene composites containing minerals. Three different mineral fillers were studied: calcium carbonate, wollastonite and talc. Colour changes were evaluated after distinct periods; the total time of exposure of the composites to UV irradiation was 2000 h. The weathering resulted in significant colour fading of the composites. The composites containing mineral fillers had higher changes of colour (lightness) than the reference composite. Scanning electron microscopy analysis revealed deterioration of the polymer surface layer in all weathered composites. Exposure of the reference composite to UV irradiation resulted in the disappearance of the polypropylene surface layer and disclosure of wood fibres, which led to a higher drop in the lignin content of this composite compared to mineral-containing composites. A substitution of part of the wood with mineral fillers resulted in decreased water absorption and thickness swelling of mineral-containing composites, compared to the reference composite. Exposure to water immersion-freeze-thaw cyclic treatment and UV irradiation led to a decrease in the Charpy impact strength of the composites, except for the composite containing talc

sted, utgiver, år, opplag, sider
Elsevier, 2012. Vol. 43, nr 11, s. 2087-2094
HSV kategori
Forskningsprogram
Trä och bionanokompositer
Identifikatorer
URN: urn:nbn:se:ltu:diva-67846DOI: 10.1016/j.compositesa.2012.07.003Scopus ID: 2-s2.0-84865529149OAI: oai:DiVA.org:ltu-67846DiVA, id: diva2:1187724
Tilgjengelig fra: 2018-03-05 Laget: 2018-03-05 Sist oppdatert: 2018-03-05bibliografisk kontrollert

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